To provide a hair brush such that hair or the like clinging to the brush can be removed quickly and that its reciprocating sliding movement is not hindered by dust entering the brush and clinging to brush pins and hair- removal-guiding pins.

This hair brush has a brush part formed on one side of a brush base, hair-removal plates 4 having through holes 5 that can fit over brush pins 3 are fitted over the brush part, a hair-removal-guiding plate 6 having through holes 13 through which brush-base guide pins 7 can be passed are fitted over the opposite side of the brush pins 3, a recessed fitting piece is provided in the hair-removal plate 6, the hair-removal-guiding plate is provided with a projecting fitting piece, and the pieces are combined into a pair to form a box. The brush base can reciprocate inside the box within the range of the length of the brush pin, and when the hair-removal plate 4 is pushed up to the roots of the brush pins 3, a guide groove 2 is closed; when the hair-removal plate 2 is pushed down to the ends of the brush pins 3, the guide groove 12 is opened by the movement of the brush-base guide pins 7.