An object to be solved by the present invention is to provide a superior prophylactic agent and/or therapeutic agent for stress urinary incontinence. The present invention provides a prophylactic agent and/or a therapeutic agent for stress urinary incontinence comprising an effective amount of 4-piperidyl diphenylpropoxyacetate or a salt thereof, and a pharmaceutical carrier.本發明應解決之課題為提供一種針對應力性尿失禁之優良預防劑及/或治療劑。本發明提供一種含有有效量之二苯基丙氧基乙酸4-哌啶酯或其鹽與藥學載體之應力性尿失禁預防劑及/或治療劑。