[Problem to be Solved] It cannot be said that the irradiation range of laser light is sufficiently wide, a lot of labor is taken to irradiate the skin with laser light, and there has been a problem that efficiency of cosmetic treatment is bad.[Solution] A laser treatment device is provided with a laser light source 40 consisting of at least one or more VCSEL array 41 that has two or more VCSEL elements 41s arranged on a single wafer and emits laser light for irradiating the skin. The laser treatment device may also be provided with: a reflected-light power detection means that detects power of reflected light of the light irradiating an irradiation part, the reflected light reflected from the irradiation part； and a control means that adjusts, in accordance with the power of the reflected light detected by the reflected-light power detection means, power of the laser light emitted from the light source means.
