A medicine comprising a 1-indansulfamide compound such as N-[(1s)-2,2,5,7-tetrafluoro-2,3-dihydro-1H-indene-1-yl]sulfamide, or N-[(1s)-2,2-difluoro-7-methyl-2,3-dihydro-1H-indene-1-yl]sulfamide, or a pharmaceutically acceptable salt thereof has an analgesic effect in the mouse hot-plate test and rat constriction nerve injury model and thus holds promise as a therapeutic agent for acute pain and chronic pain.