PROBLEM TO BE SOLVED: To provide a probe which allows optical fiber fixing tools to be distributed substantially uniformly and symmetrically longitudinally or laterally and is easily fitted, even when a head part size of a subject changes.SOLUTION: A plurality of optical fiber fixing tools which fix incident optical fibers and detection optical fibers are arranged on a fixing part in a substantially straight line shape, a plurality of the fixing parts are included, the fixing parts are arranged so that its straight line direction is oriented in a substantially parietal direction, the optical fiber fixing tool on the fixing part and the optical fiber fixing tool on the adjacent different fixing part are connected by a connecting member, and the connecting member is made rotatable around the optical fiber fixing tool, whereby the probe can be fitted so that the optical fibers are arranged substantially symmetrically and uniformly longitudinally or laterally.COPYRIGHT: (C)2009,JPO&INPIT【課題】 被験者の頭部サイズが変わっても,前後または左右でほぼ均等かつ対象に光ファイバ固定具が分布させ,かつ装着が簡便なプローブを提供する。【解決手段】 入射用光ファイバ及び検出用光ファイバを固定する複数の光ファイバ固定具を固定部上にほぼ直線状に配置し,前記固定部を複数有し,前記固定部はその直線方向がほぼ頭頂方向を向くように配置され,前記固定部上の光ファイバ固定具と,別の隣り合った固定部上の光ファイバ固定具を連結部材で連結し,前記連結部材を光ファイバ固定具を中心に回転可能にすることにより,前後または左右にほぼ対象かつ均等に光ファイバが配置されるようにプローブを装着できる。【選択図】 図4