PROBLEM TO BE SOLVED: To provide: a safe biological optical measurement probe stably executing optical measurement and electroencephalographic measurement and a biological optical measurement apparatus using the same.SOLUTION: A plurality of optical fiber fixing devices for fixing an incident optical fiber and a detecting optical fiber are formed with recesses for housing electroencephalographic electrodes, at their bases in a side coming into contact with a skin, into a shape fitted to the shape of the electroencephalographic electrodes. The electrode used has a hole formed in its upper part, the distal end of the optical fiber fixed by the fixing device is inserted into the hole of the electrode and the electrode is fitted in the groove. The fixing device base and the electrode base have substantially same heights and the optical fiber distal end is installed at a substantially same height to or a slightly projecting from the base. A handle-like portion of the electrode or a cable is made to pass through a cut of the fixing device base edge portion, so that the optical fiber and the electrode stably come into contact with the skin. When bringing them into contact with the skin, cream-like electroencephalographic paste is applied to the inside of the collodion electrode so as to prevent the optical fiber distal end alone from biting into the skin to cause pain.COPYRIGHT: (C)2010,JPO&INPIT【課題】光計測も脳波計測も安定して行え,安全な生体光計測用プローブ及びそれを用いた生体光計測装置。【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の皮膚に接する側の底面に,脳波電極の形状に合わせた脳波電極が納まる窪みを形成する。上部に穴が開いた形状の電極を用い,固定具で固定されている光ファイバの先端部は電極の穴に差し込み,電極は窪みにはめ込む。固定具底面と電極底面はほぼ同じ高さにし,光ファイバ先端はこれら底面とほぼ同じ高さまたはやや突き出すように設置する。電極の柄状部分またはケーブルは固定具底面縁部の切れ込みを通すので,光ファイバおよび電極は安定して皮膚に接触することが可能である。皮膚に接触させるときは,前述のコロディオン電極の内側にクリーム状の脳波用ペーストを塗布するので,光ファイバ先端部だけが皮膚にくいこんで痛みを発生させることはない。【選択図】図1