PROBLEM TO BE SOLVED: To provide a medical leak inspection device having a structure capable of securing a satisfactory field of view through a viewing window part.SOLUTION: A medical leak inspection device 1 is provided with: a main body part 13 having a cylindrical part 11 and a viewing window part 12 and having a recess formed in front a balloon member 14 which is provided along the outer peripheral surface 17 of the cylindrical part 11 and a tubular body 23 provided with an injection lumen 15 for injecting the fluid into a space in front of the viewing window part 12 and an exhaust lumen 16 for exhausting the space in front of the viewing window part 12.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2018,JPO&INPIT【課題】視認用窓部を介した良好な視野を確保することが可能な構造の医療用リーク検査装置を提供する。【解決手段】医療用リーク検査装置1は、筒状部11と視認用窓部12とを有し前方に凹部が形成されている本体部13と、筒状部11の外周面17に沿って設けられたバルーン部材14と、視認用窓部12の前方の空間への注液を行うための注液用ルーメン15及び視認用窓部12の前方の空間からの排気を行うための排気用ルーメン16が形成された管状体23と、を備えている。【選択図】図4