PROBLEM TO BE SOLVED: To provide a pulse oxymeter probe capable of measuring while being a clip style, an arterial oxygen saturation more precisely.SOLUTION: A pulse oxymeter probe includes: a pair of housings which form a housing part for a measurement portion of a subject between themselves, and in which tips forming an inlet of the housing part are openably/closably connected so as to approach and be separated, and a light emission part and a light receiving part are oppositely arranged across the housing part and an energization member which energizes in a direction of closing the tips. The light emission part and the light receiving part have an arrangement relation that the optical axis of the light emission part is out of the center of the light receiving part in a state of closing the tips, and moves to the center of the light receiving part as the tips are opened.SELECTED DRAWING: Figure 4COPYRIGHT: (C)2017,JPO&INPIT【課題】クリップ式であっても、より精度良く、動脈血酸素飽和度を計測できるパルスオキシメータプローブを提供すること。【解決手段】互いの間に被検者の測定部位の収容部を形成し、収容部の入口をなす先端部同士が接近離反するように開閉自在に連結され、収容部を挟んで発光部と受光部とが対向配置される一対のハウジングと、先端部同士を閉じる方向に付勢する付勢部材と、を有する。発光部及び受光部は、発光部の光軸が、先端部同士を閉じた状態では受光部の中心から外れており、先端部同士を開くにつれて受光部の中心に向けて移動する、配置関係を有する。【選択図】図4