PROBLEM TO BE SOLVED: To provide a technology for calibrating illuminance of a light source of a skin condition measuring apparatus with high accuracy.SOLUTION: The skin condition measuring apparatus includes: the light source for emitting light a light projecting part for projecting light to a skin of a subject an imaging part including a light receiving part for receiving light from the skin for imaging the skin and a protecting cap attachably and detachably arranged in a body part having the light projecting part and the imaging part and for covering the light projecting part and the imaging part. The protecting cap includes a translucent member opposing to the light source and the light receiving part, and a reflecting member for reflecting the light projected from the light projecting part and penetrating through the translucent member in a direction of the light receiving part.COPYRIGHT: (C)2013,JPO&INPIT【課題】肌状態測定装置の光源の照度を高精度で較正する技術を提供する。【解決手段】肌状態測定装置は、光を照射する光源を含み、被験者の肌に光を投光する投光部と、当該肌からの光を受光する受光部を含み、当該肌を撮像する撮像部と、投光部及び撮像部を有する本体部に着脱可能に取り付けられ、当該投光部及び当該撮像部を覆う保護キャップとを備え、保護キャップが、当該光源及び当該受光部に対向する透光性部材と、上記投光部から投光されその透光性部材を透過した光を当該受光部の方向に反射する反射部材と、を含む。【選択図】図4