A biological information measuring device capable of optically measuring biological information, wherein the housing is provided in the housing, a light emitting unit that irradiates light to the outside of the housing, and the housing is provided. A light receiving unit that is arranged away from the light emitting unit in a first direction, and a light receiving unit that is arranged in the housing and between the light emitting unit and the light receiving unit in the first direction. Of the biological information measuring device, which includes a light-shielding portion that forms a space in which the light does not directly reach and a temperature sensor arranged in the space are disclosed.生体情報を光学的に測定可能な生体情報測定装置であって、筐体と、前記筐体内に設けられ、前記筐体の外部に向けて光を照射する発光部と、前記筐体内に設けられ、前記発光部に対して第１方向に離れて配置される受光部と、前記筐体内かつ前記第１方向で前記発光部と前記受光部の間に配置され、前記筐体内で前記発光部からの光が直接到達しない空間を形成する遮光部と、前記空間に配置される温度センサとを含む、生体情報測定装置が開示される
