To provide a hair dryer allowing a user to easily and quickly dry hair in a place where the user can easily look at a vanity mirror and to perform the necessary treatment with both hands while checking the condition of the top and back of the head.

The hair dryer comprises a free arm 11 and a dryer body 21 disposed at the front end 13 of the free arm 11. The free arm 11 has joint parts 15, 16 and 17. The base end 12 is held near the vanity mirror 7, and the front end 13 is movable in space, and can be locked at a desired position. The dryer body 21 has a subordinate mirror 31 collaborating with the vanity mirror 7 to make a mirror set, an air outlet 61 for blowing hot or cold air from a temperature-modulated air supply source 91 to the whole hair T of the person P, and a fluorescent lamp 41 divided from the subordinate mirror 31 by a shading plate 51.