PROBLEM TO BE SOLVED: To provide an optical measurement device, etc. capable of performing measurement in a state that light emitting means or light receiving means disposed in an inner canthus side of an eyeball is pushed into a deep side of the face of a person to be measured in the optical measurement in which light is irradiated so as to cross the anterior chamber of the eyeball of the person to be measured, and the light that has crossed the anterior chamber is received.SOLUTION: An optical measurement device 1 includes: a first mirror 29 that emits light so that it crosses the anterior chamber of an eyeball 10 of a person to be measured； a second mirror 31 that receives the light emitted from the first mirror 29 and crossing the anterior chamber； and an inner canthus pushing part 80 and a light emitting system holding part 50D that position the first mirror 29 at a position where the skin around the inner canthus of the eyeball 10 is pushed into an eye socket 17 where the eyeball 10 is put.SELECTED DRAWING: Figure 3【課題】被計測者の眼球の前眼房を横切るように光を照射し、前眼房を横切った光を受光する光計測において、眼球の目頭側に配置する出射手段または受光手段を、被計測者の顔の奥側に押し込んだ状態で計測できる光計測装置などを提供する。【解決手段】本発明の光計測装置１は、被計測者の眼球１０の前眼房を横切るように光を出射する第１ミラー２９と、第１ミラー２９から出射され前眼房を横切った光を受光する第２ミラー３１と、眼球１０の目頭周辺の皮膚を眼球１０が収容された眼窩１７内に押し込んだ位置に第１ミラー２９を位置決めする目頭押込部８０および発光系保持部５０Ｄとを備える。【選択図】図３
