PROBLEM TO BE SOLVED: To provide a hair growth-stimulating device using light which allows whether a light source is appropriately placed to be confirmed by detecting a portion to be irradiated with light.SOLUTION: The hair growth-stimulating device using light includes: a light source part having the plurality of light sources and irradiating the skin with near infrared light a control unit for controlling lighting of the light sources in the light source part and an irradiation region determining means for determining a region to be irradiated with near infrared light. When the irradiation region determining means determines that at least a part of the skin is a region to be irradiated with the near infrared light, the control unit performs control so that the light source facing the region is lighted and the region is irradiated with the near infrared light.COPYRIGHT: (C)2012,JPO&INPIT【課題】光を照射すべき箇所を検知して、光源が適切に配置されているかを確認することができる光育毛器を提供する。【解決手段】本発明の光育毛器は、複数の光源を有し、皮膚に対して近赤外光を照射する光源部と、上記光源部における光源の点灯を制御する制御部と、上記近赤外光を照射すべき部位を判断する照射部位判断手段と、を備える。そして、上記照射部位判断手段において、皮膚の少なくとも一部が近赤外光を照射すべき部位であると判断した場合、上記制御部は当該部位に対向する光源を点灯させ、当該部位に近赤外光を照射するように制御する。【選択図】図1