PROBLEM TO BE SOLVED: To provide a negative pressure treatment device capable of stabilizing a pressure value of a closing part.SOLUTION: A negative pressure treatment device 10 comprises: a covering material 16 that covers a wound part 12 to form a closing part 14 a suction flow passage T1 for discharging waste fluid 18 from the closing part 14 suction means 20 for sucking the waste fluid 18 to the suction flow passage T1 an accommodating container 22 that accommodates the waste liquid 18 and pressure measuring means PS that measures pressure in the closing part 14. A control device 36 is provided to cause the pressure in the closing part 14 to be a target value P0. The control device 36 includes control means 38, variation existence determination means 40, control prohibition means 42, and releasing means 44.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】閉塞部の圧力値を安定させることができる陰圧治療装置を提供する。【解決手段】陰圧治療装置10は、創傷部12を覆って閉塞部14を形成する被覆材16、閉塞部14から廃液18を排出するための吸引流路T1、廃液18を吸引流路T1に吸引するための吸引手段20、廃液18を収容する収容容器22、閉塞部14の圧力を測定する圧力測定手段PSを備える。閉塞部14の圧力を目標値P0にするために、制御装置36を備える。制御装置36は、制御手段38、変動有無判断手段40、制御禁止手段42および解除手段44を備える。【選択図】図1