PROBLEM TO BE SOLVED: To provide an antibacterial composition having a lytic activity against a Pseudomonas aeruginosa strain. An antibacterial composition comprising at least two distinct bacteriophages having lytic activity against a Pseudomonas aeruginosa strain. [Selection diagram] None【課題】緑膿菌(P.aeruginosa)株に対する溶解活性を有する抗菌組成物の提供。【解決手段】緑膿菌(P.aeruginosa)株に対する溶解活性を有する少なくとも2つの別個のバクテリオファージを含む抗菌組成物。【選択図】なし