An object of the present invention is to provide a novel phage effective for the treatment of bacterial endophthalmitis, and a bacterial endophthalmitis therapeutic agent containing the novel phage. The therapeutic agent for bacterial endophthalmitis of the present invention comprises a member selected from Myoviridae Spounavirinae phiEF7H (registered number: NITE BP-02886), Myoviridae SpounavirinaeunphiEF19G (registered number: NITE : BP-02887), Myoviridae Spounavirinae phiEF14H1 (registered number: NITE -02888), and the mutants are one or more types of phage in the necessary group.本發明的目的在於提供一種對細菌性眼內炎的治療有效的新型噬菌體、以及包含該新型噬菌體之細菌性眼內炎治療劑。本發明的細菌性眼內炎治療劑係包含以選自Myoviridae Spounavirinae phiEF7H(寄存編號:NITE BP-02886)、Myoviridae Spounavirinae phiEF19G(寄存編號:NITE BP-02887)、Myoviridae Spounavirinae phiEF14H1(寄存編號:NITE BP-02888)、以及其等突變體為必要的群組中1種以上的噬菌體。