Provided is a negative pressure closure treatment device that prevents the pump device from being detached from a wound dressing. The housing (22) of the pump device (20) is fixed to the drape (11) of the wound dressing (10) by a joint. Since the suction chamber (30) that becomes negative pressure by driving the piezoelectric pump (36) communicates directly with the closed space (904) through the opening (12) and the inlet (21), the treatment device (100) Need not be provided with piping for communicating the closed space (904) and the pump device (20). Therefore, since the treatment device (100) does not need to include a pipe for communicating the pump device (20) with the closed space (904), the pump device (20) is attached from the wound dressing (10) due to the disconnection of the pipe. Since the casing (22) is fixed to the drape (11) by the joint portion without causing detachment, it is possible to prevent the pump device (20) from being detached from the wound dressing (10).ポンプ装置の創傷包帯からの装着外れを防止する陰圧閉鎖治療装置を提供する。 ポンプ装置（２０）の筐体（２２）は、接合部によって創傷包帯（１０）のドレープ（１１）に固定される。圧電ポンプ（３６）の駆動によって陰圧になる吸引室（３０）が閉鎖空間（９０４）に開口部（１２）及び流入口（２１）を介して直接的に連通するため、治療装置（１００）は、閉鎖空間（９０４）とポンプ装置（２０）とを連通させる配管を備える必要が無い。従って、治療装置（１００）は、ポンプ装置（２０）を閉鎖空間（９０４）に連通させる配管を備える必要が無いため、配管外れに起因するポンプ装置（２０）の創傷包帯（１０）からの装着外れを発生させず、接合部によって筐体（２２）がドレープ（１１）に固定されるため、ポンプ装置（２０）の創傷包帯（１０）からの装着外れを防止することができる。
