PROBLEM TO BE SOLVED: To provide a negative pressure treatment device which can specify a clogged portion and does not damage a wound part.SOLUTION: A negative pressure treatment device 10 includes: a covering material 16 covering a wound part 12 and forming a closed part 14 a suction flow passage Ta discharging waste liquid 18 from the closed part 14 suction means 20 suctioning the waste liquid 18 through the suction flow passage Ta a storage container 22 storing the waste liquid 18 in the midst of the suction flow passage Ta first pressure measurement means PS1 measuring a pressure of the closed part 14 a first sensing flow passage T1 connecting the closed part 14 and the first pressure measurement means PS1 a first open valve SV1 connected in the first sensing flow passage T1 and second pressure measurement means PS2 measuring a pressure of the storage container 22.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】詰まり箇所を特定することができ、創傷部にダメージを与えない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が排出される吸引流路Ta、吸引流路Taを通じて廃液18を吸引する吸引手段20、吸引流路Taの途中で廃液18を収容する収容容器22、閉塞部14の圧力を測定する第1圧力測定手段PS1、閉塞部14と第1圧力測定手段PS1とを接続する第1センシング流路T1、第1センシング流路T1に接続された第1開放弁SV1、および収容容器22の圧力を測定する第2圧力測定手段PS2を備える。【選択図】図1