A sheet-like sticking member (30) having a sticking surface (30b) to be attached to a subject, and a first region in which the medical device (20) can be attached to an attachment surface (30a) different from the sticking surface (30b) (31) and the second region (32) provided around the first region (31) and the first region (31), or the first region, the adhesive force of the application surface being stronger than the first region A sticking member (30) comprising: a planned fracture portion (33) capable of breaking between the region (31) and the second region (32).被検者に貼付する貼付面（３０ｂ）を有するシート状の貼付部材（３０）であって、貼付面（３０ｂ）と異なる取付面（３０ａ）に医療装置（２０）を取付け可能な第１領域（３１）と、前記貼付面の粘着力が前記第１領域よりも強い、第１領域（３１）の周囲に設けられる第２領域（３２）と、第１領域（３１）内、又は第１領域（３１）と第２領域（３２）との間、を破断可能な破断予定部（３３）と、を備える、貼付部材（３０）。
