| Name | National party | Constituency | EP Group |
| Filip Adwent (until 26 June 2005) Andrzej Tomasz Zapałowski (from 12 July 2005) | League of Polish Families (LPR) (until 13 June 2007) Independent | Podkarpackie | IND&DEM (until 12 December 2006) UEN |
| Adam Bielan | Law and Justice (PiS) | Lesser Poland and Świętokrzyskie | UEN |
| Jerzy Buzek | Civic Platform (PO) | Silesia | EPP–ED |
| Zdzisław Chmielewski | Civic Platform (PO) | Lubusz and West Pomerania | EPP–ED |
| Sylwester Chruszcz | League of Polish Families (LPR) (until 3 December 2008) Forward Poland (NP) | Lower Silesian and Opole | IND&DEM (until 14 December 2005) NI (until 17 December 2008) UEN |
| Marek Czarnecki | Self-Defence of the Republic of Poland (SRP) (until 4 May 2008) Independent | Masovia | NI (until 14 November 2006) UEN (until 9 June 2008) ALDE |
| Ryszard Czarnecki | Self-Defence of the Republic of Poland (SRP) (until 23 January 2008) Independent (until 9 October 2008) Law and Justice (PiS) | Lower Silesian and Opole | NI (until 14 November 2006) UEN |
| Anna Elżbieta Fotyga (until 22 November 2005) Hanna Foltyn-Kubicka (from 7 December 2005) | Law and Justice (PiS) | Pomerania | UEN |
| Bronisław Geremek (until 13 July 2008) Andrzej Wielowieyski (from 26 August 2008) | Freedom Union (UW) (until 14 June 2005) Freedom Union - Democratic Party | Warsaw | ALDE |
| Lidia Geringer de Oedenberg | Democratic Left Alliance – Labour Union (SLD-UP) | Lower Silesian and Opole | PES |
| Adam Gierek | Democratic Left Alliance – Labour Union (SLD-UP) | Silesia | PES |
| Maciej Giertych | League of Polish Families (LPR) | Silesia | IND&DEM (until 14 December 2005) NI |
| Bogdan Golik | Self-Defence of the Republic of Poland (SRP) (until 16 December 2007) Independent | Łódź | NI (until 30 November 2004) PES |
| Genowefa Grabowska | Social Democracy of Poland (SDPL) | Silesia | PES |
| Dariusz Grabowski | League of Polish Families (LPR) (4 June 2007) Independent | Masovia | IND&DEM (until 12 December 2006) UEN |
| Małgorzata Handzlik | Civic Platform (PO) | Silesia | EPP–ED |
| Stanisław Jałowiecki | Civic Platform (PO) | Lower Silesian and Opole | EPP–ED |
| Mieczysław Janowski | Law and Justice (PiS) | Podkarpackie | UEN |
| Filip Kaczmarek | Civic Platform (PO) | Greater Poland | EPP–ED |
| Michał Kamiński (until 6 August 2007) Ewa Tomaszewska (from 30 August 2007) | Law and Justice (PiS) | Warsaw | UEN |
| Bogdan Klich (until 15 November 2007) Urszula Gacek (from 6 December 2007) | Civic Platform (PO) | Lesser Poland and Świętokrzyskie | EPP–ED |
| Urszula Krupa | League of Polish Families (LPR) (13 June 2006) Independent | Łódź | IND&DEM |
| Wiesław Kuc | Self-Defence of the Republic of Poland (SRP) | Lublin | NI (until 30 November 2004) PES (until 12 December 2006) UEN |
| Barbara Kudrycka (until 15 November 2007) Krzysztof Hołowczyc (from 6 December 2007) | Civic Platform (PO) (until 18 December 2007) Independent | Podlaskie and Warmian-Masuria | EPP–ED |
| Jan Kułakowski | Freedom Union (UW) | Greater Poland | ALDE |
| Zbigniew Kuźmiuk | Polish People's Party (PSL) | Masovia | EPP–ED (12 December 2005) UEN |
| Janusz Lewandowski | Civic Platform (PO) | Pomerania | EPP–ED |
| Bogusław Liberadzki | Democratic Left Alliance – Labour Union (SLD-UP) | Lubusz and West Pomeranian | PES |
| Marcin Libicki | Law and Justice (PiS) | Greater Poland | UEN |
| Janusz Wojciechowski | Polish People's Party (PSL) | | EPP–ED (12 December 2005) UEN |
| Jan Masiel | Self-Defence of the Republic of Poland (SRP) Polish People's Party "Piast" (PSL Piast) | | NI (14 November 2006) UEN |
| Jan Olbrycht | | | EPP–ED |
| Janusz Onyszkiewicz | | | ALDE |
| Bogdan Pęk | League of Polish Families (LPR) (until 24 January 2006) Independent (until 5 November 2008) Forward Poland (NP) | Lesser Poland and Świętokrzyskie | IND&DEM (until 12 December 2006) UEN |
| Józef Pinior | Social Democracy of Poland (SDPL) | | PES |
| Mirosław Piotrowski | League of Polish Families (LPR) (3 December 2006) Independent | | IND&DEM (until 12 December 2006) UEN |
| Paweł Piskorski | Civic Platform (PO) (until 31 March 2009) Alliance of Democrats | | EPP–ED (until 30 April 2006) NI (22 October 2006) ALDE |
| Zdzisław Podkański | Polish People's Party (PSL) | | EPP–ED (until 12 December 2005) UEN |
| Jacek Protasiewicz | Civic Platform (PO) | | EPP–ED |
| Bogusław Rogalski | League of Polish Families (LPR) (until 24 January 2006) Polish Forum [pl] (until 2 December 2008) Forward Poland (NP) | Podlaskie and Warmian-Masuria | IND&DEM (until 12 December 2006) UEN |
| Dariusz Rosati | | | PES |
| Wojciech Roszkowski | | | UEN |
| Leopold Rutowicz | Self-Defence of the Republic of Poland (SRP) | | NI (until 14 November 2006) UEN |
| Jacek Saryusz-Wolski | | | EPP–ED |
| Czesław Siekierski | | | EPP–ED |
| Marek Siwiec | | | PES |
| Bogusław Sonik | | | EPP–ED |
| Grażyna Staniszewska | | | ALDE |
| Andrzej Szejna | | | PES |
| Konrad Szymański | | | UEN |
| Witold Tomczak | League of Polish Families (LPR) | Greater Poland | IND&DEM |
| Wojciech Wierzejski (until 6 October 2005) Bernard Piotr Wojciechowski (from 26 October 2005) | League of Polish Families (LPR) (until 15 April 2007) Independent | | IND&DEM (until 14 December 2005) NI (until 28 March 2007) IND&DEM |
| Zbigniew Zaleski | | | EPP–ED |
| Tadeusz Zwiefka | Civic Platform (PO) | Kuyavian-Pomerania | EPP–ED |
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