In order to provide eye drops for treating dry eye that suppress apoptosis caused by lacrimal fluid hyperosmorality, the present invention relates to eye drops for treating dry eye that suppress apoptosis caused by lacrimal fluid hyperosmorality and contain diclofenac or a pharmaceutically acceptable salt thereof.本發明之目的在於提供一種用以抑制因淚液之高滲透壓所引起之細胞凋亡的治療乾眼用滴眼劑。本發明係關於一種含有雙氯芬酸(Diclofenac)或其藥學上可容許之鹽的用以抑制因淚液之高滲透壓所引起之細胞凋亡之治療乾眼用滴眼劑。