During the fifth term (1999–2004), there were 626 members of parliament divided among the 15 member states. As part of the 2004 enlargement, the national parliaments of the 10 new member states sent a total of 162 observers to the European Parliament from April 2003. On 1 May 2004, upon the countries' accession, the observers became MEPs until the start of the next term (20 July 2004) elected in the June 2004 elections.

List (by country) Name National party EP Group Country Constituency Maria Berger Social Democratic Party PES Austria Austria Herbert Bösch Social Democratic Party PES Austria Austria Mercedes Echerer The Greens–The Green Alternative G–EFA Austria Austria Harald Ettl Social Democratic Party PES Austria Austria Marialiese Flemming People's Party EPP–ED Austria Austria Gerhard Hager Freedom Party NI Austria Austria Wolfgang Ilgenfritz Freedom Party NI Austria Austria Othmar Karas People's Party EPP–ED Austria Austria Hans Kronberger Freedom Party NI Austria Austria Hans-Peter Martin Social Democratic Party PES Austria Austria Hubert Pirker People's Party EPP–ED Austria Austria Christa Prets Social Democratic Party PES Austria Austria Reinhard Rack People's Party EPP–ED Austria Austria Daniela Raschhofer Freedom Party NI Austria Austria Paul Rübig People's Party EPP–ED Austria Austria Karin Scheele Social Democratic Party PES Austria Austria Agnes Schierhuber People's Party EPP–ED Austria Austria Peter Sichrovsky Freedom Party NI Austria Austria Ursula Stenzel People's Party EPP–ED Austria Austria Hannes Swoboda Social Democratic Party PES Austria Austria Johannes Voggenhuber The Greens–The Green Alternative G–EFA Austria Austria VLD NI Belgium Dutch-speaking Resigned in 1999 SP PES Belgium Dutch-speaking Resigned in 1999 PS PES Belgium French-speaking VLD ELDR Belgium Dutch-speaking MCC EPP–ED Belgium French-speaking Resigned in 2001 PS PES Belgium French-speaking Resigned in 2003 VB NI Belgium Dutch-speaking Resigned in 2003 PRL ELDR Belgium French-speaking ECOLO G–EFA Belgium French-speaking CSP EPP–ED Belgium German-speaking PSC EPP–ED Belgium French-speaking ECOLO G–EFA Belgium French-speaking ECOLO G–EFA Belgium French-speaking VU / SPIRIT G–EFA Belgium Dutch-speaking Resigned in 2004 PRL ELDR Belgium French-speaking CVP EPP–ED Belgium Dutch-speaking VU G–EFA Belgium Dutch-speaking VLD ELDR Belgium Dutch-speaking AGALEV G–EFA Belgium Dutch-speaking Resigned in 2001 PS PES Belgium French-speaking CVP EPP–ED Belgium Dutch-speaking CVP EPP–ED Belgium Dutch-speaking SP PES Belgium Dutch-speaking Resigned in 2002 AGALEV G–EFA Belgium Dutch-speaking Resigned in 2003 VB NI Belgium Dutch-speaking Left, Liberal Party of Denmark ELDR Denmark Denmark Social Democrats PES Denmark Denmark June Movement EDD Denmark Denmark Left, Liberal Party of Denmark ELDR Denmark Denmark People's Party UEN Denmark Denmark Social Liberal Party ELDR Denmark Denmark Socialist People's Party EUL-NGL Denmark Denmark Resigned in 2001 Left, Liberal Party of Denmark ELDR Denmark Denmark Left, Liberal Party of Denmark ELDR Denmark Denmark People's Movement against the EU EUL–NGL Denmark Denmark Social Democrats PES Denmark Denmark Resigned in 2003 June Movement EDD Denmark Denmark Left, Liberal Party of Denmark ELDR Denmark Denmark Conservative People's Party EPP–ED Denmark Denmark June Movement EDD Denmark Denmark Social Democrats PES Denmark Denmark Uma Aaltonen Green League G–EFA Finland Finland Ulpu Iivari Social Democratic Party PES Finland Finland Piia-Noora Kauppi National Coalition Party EPP–ED Finland Finland Eija-Riitta Korhola National Coalition Party EPP–ED Finland Finland Marjo Matikainen-Kallström National Coalition Party EPP–ED Finland Finland Riitta Myller Social Democratic Party PES Finland Finland Reino Paasilinna Social Democratic Party PES Finland Finland Mikko Pesälä Centre Party ELDR Finland Finland Samuli Pohjamo Centre Party ELDR Finland Finland Esko Olavi Seppänen Left Alliance EUL–NGL Finland Finland Ilkka Suominen National Coalition Party EPP–ED Finland Finland Astrid Thors Swedish People's Party ELDR Finland Finland Paavo Väyrynen Centre Party ELDR Finland Finland Ari Vatanen National Coalition Party EPP–ED Finland Finland Kyösti Virrankoski Centre Party ELDR Finland Finland Matti Wuori Green League G–EFA Finland Finland Alekos Alavanos Coalition of the Left and Progress EUL–NGL Greece Greece Konstantinos Alyssandrakis Communist Party EUL–NGL Greece Greece Ioannis Averoff New Democracy EPP–ED Greece Greece Emmanouil Bakopoulos Democratic Social Movement EUL–NGL Greece Greece Alexandros Baltas Socialist Movement PES Greece Greece Giorgos Dimitrakopoulos New Democracy EPP–ED Greece Greece Petros EfthymiouResigned in 2000 Socialist Movement PES Greece Greece Christos Folias New Democracy EPP–ED Greece Greece Konstantinos Hatzidakis New Democracy EPP–ED Greece Greece Anna Karamanou Socialist Movement PES Greece Greece Giorgos Katiforis Socialist Movement PES Greece Greece Efstratios Korakas Communist Party EUL–NGL Greece Greece Ioannis Koukiadis Socialist Movement PES Greece Greece Dimitrios Koulourianos Democratic Social Movement EUL–NGL Greece Greece Rodi Kratsa-Tsagaropoulou New Democracy EPP–ED Greece Greece Minerva Melpomeni Malliori Socialist Movement PES Greece Greece Ioannis Marinos New Democracy EPP–ED Greece Greece Emmanouil Mastorakis Socialist Movement PES Greece Greece Mihalis Papagiannakis Coalition of the Left and Progress EUL–NGL Greece Greece Ioannis Patakis Communist Party EUL–NGL Greece Greece Ioannis Souladakis Socialist Movement PES Greece Greece Antonios Trakatellis New Democracy EPP–ED Greece Greece Dimitris Tsatsos Socialist Movement PES Greece Greece Stavros Xarchakos New Democracy EPP–ED Greece Greece Christos Zacharakis New Democracy EPP–ED Greece Greece Myrsini Zorba Socialist Movement PES Greece Greece Green Party G–EFA Ireland Leinster Fianna Fáil UEN Ireland Dublin Fine Gael EPP–ED Ireland Dublin Fianna Fáil UEN Ireland Munster Independent ELDR Ireland Munster Fianna Fáil UEN Ireland Munster Fine Gael EPP–ED Ireland Munster Labour Party PES Ireland Dublin Fine Gael EPP–ED Ireland Leinster Fianna Fáil UEN Ireland Leinster Fianna Fáil UEN Ireland Connacht–Ulster Fianna Fáil UEN Ireland Leinster Fine Gael EPP–ED Ireland Connacht–Ulster Independent EPP–ED Ireland Connacht–Ulster Colette Flesch Democratic Party ELDR Luxembourg Luxembourg Robert Goebbels Socialist Workers' Party PES Luxembourg Luxembourg Astrid Lulling Christian Social People's Party EPP–ED Luxembourg Luxembourg Jacques Poos Socialist Workers' Party PES Luxembourg Luxembourg Jacques Santer Christian Social People's Party EPP–ED Luxembourg Luxembourg Claude Turmes The Greens G-EFA Luxembourg Luxembourg

B Emmanouil Bakopoulos Richard Balfe Alexandros Baltas Mary Banotti Enrique Barón Crespo Paolo Bartolozzi Regina Bastos Juan Bayona de Perogordo Christopher Beazley Jean-Pierre Bebear Bastiaan Belder Rolf Berend Luis Berenguer Fuster Pervenche Berès Margrietus van den Berg María Bergaz Conesa Maria Berger Sergio Berlato Jean-Louis Bernié Georges Berthu Fausto Bertinotti Ward Beysen Roberto Bigliardo Freddy Blak Johannes Blokland Guido Bodrato Reimer Böge Herbert Bösch Christian von Boetticher Jens-Peter Bonde Emma Bonino Johanna Boogerd-Quaak Graham Booth Armonia Bordes Mario Borghezio Bob van den Bos Enrico Boselli Yasmine Boudjenah Alima Boumediene-Thiery Jean-Louis Bourlanges Theodorus Bouwman David Bowe John Bowis Philip Bradbourn Cees Bremmer Hiltrud Breyer André Brie Giuseppe Brienza Elmar Brok Renato Brunetta Kathalijne Buitenweg Hans Bullmann Ieke van den Burg Philip Bushill-Matthews Niels Busk Yves Butel

C Martin Callanan Giorgio Calò Felipe Camisón Asensio António Campos Mogens Camre Carlos Candal Marco Cappato Raquel Cardoso Marie-Arlette Carlotti Carlos Carnero González Massimo Carraro Maria Carrilho Paulo Casaca Michael Cashman Gérard Caudron Isabelle Caullery Chantal Cauquil Charlotte Cederschiöld Giorgio Celli Alejandro Cercas Carmen Cerdeira Morterero Luigi Cesaro Ozan Ceyhun Giles Chichester Philip Claeys Nicholas Clegg Luigi Cocilovo Carlos Coelho Daniel Cohn-Bendit Gerry Collins Joan Colom i Naval Richard Corbett Dorette Corbey Thierry Cornillet John Corrie Armando Cossutta Paolo Costa Raffaele Costa Paul Coûteaux Pat Cox Brian Crowley John Cushnahan

D Rijk van Dam Elisa Damião Danielle Darras Michel Dary Joseph Daul Chris Davies Willy De Clercq Francis Decourrière Jean-Maurice Dehousse Véronique De Keyser Gianfranco Dell'Alba Benedetto Della Vedova Marcello Dell'Utri Luigi De Mita Gérard Deprez Proinsias De Rossa Marielle De Sarnez Marie-Hélène Descamps Harlem Désir Nirj Deva Christine De Veyrac Jan Dhaene Rosa Díez González Giuseppe Di Lello Finuoli Koenraad Dillen Giorgos Dimitrakopoulos Antonio Di Pietro Bert Doorn Den Dover Avril Doyle Bárbara Dührkop Dührkop Andrew Duff Olivier Duhamel Garrelt Duin Olivier Dupuis Lone Dybkjær

E Michl Ebner Raina Echerer Petros Efthymiou Säid El Khadraoui James Elles Marianne Eriksson Alain Esclopé Harald Ettl Jillian Evans Jonathan Evans Robert Evans

F Göran Färm Nigel Farage Carlo Fatuzzo Gianni Fava Markus Ferber Fernando Fernández Martín Juan Ferrández Lezaun Anne Ferreira Concepció Ferrer Enrico Ferri Christel Fiebiger Ilda Figueiredo Francesco Fiori Jim Fitzsimons Hélène Flautre Marialiese Flemming Colette Flesch Karl-Heinz Florenz Christos Folias Glyn Ford Marco Formentini Jacqueline Foster Janelly Fourtou Pernille Frahm Geneviève Fraisse Monica Frassoni Ingo Friedrich Jean-Claude Fruteau

G Michael Gahler Per Gahrton Gerardo Galeote Quecedo Marie-Françoise Garaud José García-Margallo y Marfil Cristina García-Orcoyen Tormo Giuseppe Gargani Georges Garot Salvador Garriga Polledo Carles-Alfred Gasòliba i Böhm Charles de Gaulle Jas Gawronski Evelyne Gebhardt Vitaliano Gemelli Fiorella Ghilardotti Neena Gill Marie-Hélène Gillig José Gil-Robles Gil-Delgado Norbert Glante Anne-Karin Glase Gian Gobbo Robert Goebbels Lutz Goepel Willi Görlach Bruno Gollnisch Alfred Gomolka Robert Goodwill Koldo Gorostiaga Atxalandabaso João Gouveia Friedrich-Wilhelm Graefe zu Baringdorf Vasco Graça Moura Pauline Green (resigned November 1999) Lissy Gröner Lisbeth Grönfeldt Bergman Mathieu Grosch Françoise Grossetête Cristina Gutiérrez-Cortines Catherine Guy-Quint

H Klaus Hänsch Gerhard Hager Daniel Hannan Michel Hansenne Malcolm Harbour Konstantinos Hatzidakis Jutta Haug Adeline Hazan Christopher Heaton-Harris Ewa Hedkvist Petersen Roger Helmer Marie-Thérèse Hermange Jorge Hernández Mollar Esther Herranz García Philippe Herzog Ruth Hieronymi Magdalene Hoff Mary Honeyball (from 2000) Brice Hortefeux Richard Howitt Ian Hudghton Stephen Hughes Christopher Huhne Michiel van Hulten John Hume Liam Hyland

I Ulpu Iivari Wolfgang Ilgenfritz Renzo Imbeni Lord Inglewood Marie Anne Isler Béguin Juan Izquierdo Collado María Izquierdo Rojo

J Caroline Jackson Georg Jarzembowski Thierry Jean-Pierre Elisabeth Jeggle Anne Jensen Karin Jöns Pierre Jonckheer Salvador Jové Peres Karin Junker

K Anna Karamanou Othmar Karas Hans Karlsson Martin Kastler Giorgos Katiforis Sylvia-Yvonne Kaufmann Piia-Noora Kauppi Hedwig Keppelhoff-Wiechert Margot Kessler Bashir Khanbhai Heinz Kindermann Glenys Kinnock Timothy Kirkhope Ewa Klamt Christa Klaß Karsten Knolle Dieter-Lebrecht Koch Christoph Konrad Efstratios Korakas Eija-Riitta Korhola Ioannis Koukiadis Dimitrios Koulourianos Ole Krarup Rodi Kratsa-Tsagaropoulou Constanze Krehl Wolfgang Kreissl-Dörfler Alain Krivine Hans Kronberger Wilfried Kuckelkorn Helmut Kuhne Florence Kuntz

L Carlos Lage Joost Lagendijk Arlette Laguiller Catherine Lalumière Alain Lamassoure Jean Lambert Carl Lang Bernd Lange Werner Langen Brigitte Langenhagen Paul Lannoye Thierry de La Perriere Armin Laschet Vincenzo Lavarra Kurt Lechner Klaus-Heiner Lehne Jo Leinen Peter Liese Rolf Linkohr Alain Lipietz Giorgio Lisi Raffaele Lombardo Caroline Lucas Sarah Ludford Astrid Lulling Torben Lund Elizabeth Lynne

M Albert Maat Jules Maaten