Abstract: A portable folding hairbrush includes a head rim with a plurality of guide pins regularly and internally formed along the inside edge of the head rim, a grip connected to the head rim by a hinge and is provided with a mirror on its inner portion, a flexible support bed having a plurality of guide holes and is fitted into the head rim by pivoting the guide pins into the guide holes of the head rim, a plurality of hard bristles having pressure beads at the other end of the bristles, implanted into the support bed reqularly, and held by the support bed at their lower portions, so that the hairbrush accomplishes a firm fixation of the support bed to the head rim and a smooth operation of a support bed, and has a simple structure suitable for automation of production and to be collaterally usable for massage.