PROBLEM TO BE SOLVED: To provide a biological light measuring apparatus capable of measuring brain activity on the inside surface of the cerebrum.SOLUTION: The biological light measuring apparatus includes a probe 25 which can be put on a living body and which comprises a measuring instrument having a plurality of light irradiators for irradiating the head of the living body with light, and a light receiver for detecting the light passing through the inside of the head of the living body and emitted from the surface of the living body and an analysis part for analyzing the distribution of the received light based on signals acquired from a measuring part. When the probe 25 is put on, the probe 25 is shaped to arrange one or more measuring instruments in a column in the longitudinal direction of a cerebrum column in the head of the living body while covering the cerebrum column.COPYRIGHT: (C)2012,JPO&INPIT【課題】大脳の内側表面における脳活動の計測が可能な生体光計測装置を提供する【解決手段】生体頭部に光を照射する複数の光照射器と、生体頭部内を通過して生体表面から出射する光を検出する光受光器と、を有する計測器を備える、生体に装着可能なプローブ25と、計測部から取得された信号に基づいて、受光した光の分布を解析する解析部と、を有し、プローブ25は、当該プローブが装着された場合、一または複数の計測器が、生体頭部内の大脳縦列を覆い、大脳縦列の長手方向に縦列に配置される形状を有する。【選択図】図15