PROBLEM TO BE SOLVED: To provide a brain function measurement apparatus and a probe holder for the brain function measurement apparatus capable of suppressing a change of measurement positions of the brain area in accordance with size of the head of a subject.SOLUTION: There are provided: a light measurement part including a measurement probe； and a probe holder for fixing the measurement probe to the head of a subject. The probe holder includes: a plurality of holder members 5 where measurement probes are fitted respectively and are arranged on the head surface of the subject and which include hole parts 51a； connection parts 6 connecting the plurality of holder members 5 together via the hole parts 51a； and fixing members 7 which are fitted to the holder members 5 and fix fixing parts (fitting hole parts 61) of the connection parts 6. The fixing members 7 are configured so that relative positions (height H) of the fixing parts of the connection parts 6 with respect to the hole parts 51a are adjustable.SELECTED DRAWING: Figure 6【課題】被験者の頭部の大きさに応じて、脳領域の計測位置が変化することを抑制可能な脳機能計測装置および脳機能計測装置用プローブホルダを提供する。【解決手段】計測プローブを含む光計測部と、計測プローブを被験者の頭部に固定するためのプローブホルダとを備え、プローブホルダは、計測プローブがそれぞれ取り付けられ、被験者の頭部の表面に配置されるとともに、孔部５１ａを含む複数のホルダ部材５と、孔部５１ａを経由して、複数のホルダ部材５同士を連結する連結部６と、ホルダ部材５に取り付けられ、連結部６の固定部分（取付穴部６１）を固定する固定部材７とを含み、固定部材７は、孔部５１ａに対する連結部６の固定部分の相対位置（高さｈ）が調整可能に構成されている。【選択図】図６
