An eye drop containing (i) a peptide having an amino acid sequence which is represented by Ser-Ser-Ser-Arg (“SSSR”), or a pharmaceutically acceptable salt thereof and (ii) a peptide having an amino acid sequence represented by Phe-Gly-Leu-Met-NH2 (“FGLM”), or a pharmaceutically acceptable salt thereof. The concentration ratio of the SSSR or a pharmaceutically acceptable salt thereof and the FGLM or a pharmaceutically acceptable salt thereof is 1/15 and 1/50. The concentration of the SSSR or a pharmaceutically acceptable salt thereof is 0.001% to 0.3% (w/v), and the concentration of the FGLM or a pharmaceutically acceptable salt thereof is 0.015% to 1.5% (w/v). The pH of the eye drop is 2.5 to 6.5. The eye drop serves to minimize the occurrence of side effects and serves to improve its storage stability.