Regarding the probe holder installation tool of the organism optical measuring device, it possesses the probe holder and the plural holes possesses the plural probe applied parts where the optical fiber probe is installed in order which to do the above-mentioned probe applied part, through these holes, the one end is connected by both ends of longitudinal direction of installation tool itself of the belt shape which locks above-mentioned probe holder and the above-mentioned installation tool itself, at the position where the above-mentioned probe holder is locked in addition in shortly the hand direction of the belt and the above-mentioned installation tool itself which are engaged in the edge for adjustment which the above-mentioned installation tool itself is connectedIt has with the belt.生体光計測装置のプローブホルダ装着具においては、光ファイバプローブが装着される複数のプローブ装着部を有するプローブホルダと、上記プローブ装着部を挿通するための複数の挿通穴を有し、これらの挿通穴を介して上記プローブホルダを固定する帯状の装着具本体と、上記装着具本体の長手方向の両端部にその一端が接続され、その他端で係合されるベルトと、上記装着具本体の短手方向において上記プローブホルダが固定される位置で上記装着具本体と接続される調整用ベルトとを備える。
