A sheet-like application member 30 having an application surface 30b to be applied to a subject, the application member 30 including a first region 31 having an attachment surface 30a to which a medical device 20 can be attached, the attachment surface 30a being different from the application surface 30b, a second region 32 having stronger adhesion in the application surface than the first region and provided around the first region 31, and a tear portion 33 capable of tearing a portion within the first region 31 or of tearing apart the first region 31 and the second region 32.
