[Object] A compound which is useful as an EP1 receptor antagonist is provided. [Means for Solution] The present inventors investigated EP1 receptor antagonists, and confirmed that a compound having a sulfonamide structure, in which the nitrogen atom of the sulfonamide structure is substituted with 2-fluoropropyl group, 3-fluoro-2-methylpropyl group or the like, has a potent EP1 receptor antagonistic action, thereby completing the present invention. The sulfonamide compound of the present invention has a potent EP 1 receptor antagonistic action and can be used as an agent for preventing and/or treating a lower urinary tract symptom or the like.
