The men's tournament of water polo at the 2008 Summer Olympics at Beijing, People's Republic of China, began on 10 August and lasted until 24 August 2008. All games were held at the Ying Tung Natatorium.Teams from twelve nations competed, seeded into two groups for the preliminary round. 44 games were played, 30 of them in the preliminary round (each team played the other teams in the group). Seven classification games and seven games in the medal round were also played.