A phototherapy hair band device suitable for being worn on a user's head and comprising a hair band, a light source unit, and a spacer. The hair band is annular and elastic for encircling the user's head, and the light source unit is disposed on the inner circumferential surface of the hair band and is used to illuminate the user's head. The gasket is a biocompatible material and is located between the light source unit and the user's head. The whole model has a ring-shaped hair band structure, which is convenient for the user to wear on the head, and has no problem of stuffiness and discomfort compared with the conventional hat. The gasket is made of a biocompatible material to avoid allergies, redness and other symptoms that may be caused by prolonged attachment to the skin.一種光療髮帶裝置，適用於穿戴在使用者的頭部，並包含一髮帶、一光源單元，以及一墊片。該髮帶呈環形且具有彈性，用於圈圍使用者的頭部，該光源單元設置於該髮帶的內周面，並用於朝使用者頭部照光。該墊片為生物相容性材料，並位於該光源單元與使用者的頭部之間。本新型整體為環狀的髮帶結構，可方便使用者穿戴於頭部，而且相對於以往穿戴帽子而言，較不會有悶熱、不舒適的問題。該墊片為生物相容性材料製成，可避免長時間貼附皮膚所可能造成的過敏、紅腫…等症狀。
