PROBLEM TO BE SOLVED: To provide an endoscope air supply/water supply valve which can easily be pushed into a cylinder while ensuring air tightness and water tightness, and also to provide an endoscope comprising such an air supply/water supply valve.SOLUTION: An endoscope air supply/water supply valve according to the present invention comprises: a piston section extending in a rod shape； and an attachment member inserted into the piston section and attachable to an endoscope. The piston section: has a plurality of protrusions protruding in a direction perpendicular to a center axis of the piston section； and also includes a seal portion forming a hollow disc shape with the center axis of the piston section as an axis of symmetry and airtightly or watertightly shielding a space between the seal portion and the attachment member or the endoscope. In the plurality of protrusions, when the length of the protrusions in the protruding direction is d, the length of the protrusions in the center axis direction is d, and the amount of contraction of the protrusions upon their being press-contacted to an abutting target is d, the relationships d≤dand d<；dare satisfied.SELECTED DRAWING: Figure 5【課題】気密又は水密を確保しつつ、シリンダ内に容易に押し込むことができる内視鏡用送気送水弁及び内視鏡を提供すること。【解決手段】本発明にかかる内視鏡用送気送水弁は、棒状をなして延びるピストン部と、ピストン部に挿通されてなり、内視鏡に取り付け可能な取付部材と、を備え、ピストン部は、当該ピストン部の中心軸と垂直な方向に突出する複数の突起を有し、当該ピストン部の中心軸を対称軸とする中空円盤状をなし、取付部材又は内視鏡との間を気密又は水密に遮蔽するシール部を有し、複数の突起において、突起の突出方向の長さをｄA、中心軸方向の突起の長さをｄB、当接対象に圧接した際の突起の収縮量をｄCとしたとき、ｄB≦ｄA及びｄC＜ｄAの関係を満たす。【選択図】図５
