To enable a humidifier to perform hair treatment such as softening without generating uneven humidification only by putting the humidifier on the head by forming the humidifying part by plural humidifying bodies and placing the humidifying bodies in an almost oval shape in a humidifier for humidification of hair and head skin comprising a cap.

This humidifier 1 is constituted of a humidifying cap 2 comprising joined two humidifying sheets 21 with humidifying part 20 and two humidifying parts 20 are placed in front and rear of the humidifier 1. The humidifying part 20 is constituted of a water resistant interior sheet 23, an air permeable sheet 25 placed covering one whole surface of the interior sheet 23, and plural heating bodies 24 fixed in between the interior sheet 23 and the air permeable sheet 25. The plural humidifying bodies 24 are placed so as to surround an almost oval shape as a whole. More concretely, the humidifying part 20 is in a shape that both end parts in the longitudinal direction are cut off to form parts without humidifying bodies 24.