To correct and restore brush bristles to a straight shape by inserting and holding the hair tips of bristle bundles into bristle bundle insertion holes.

This toothbrush consists of a head 3 flocked with plural bristle bundle arrays and a handle 1 for clamping. A correction plate 6 is bored with the bristle bundle insertion holes 7 in the positions corresponding to the bristle bundles 4. The respective bristle bundles 4 of the toothbrush are respectively inserted and formed into these bristle bundle insertion holes 7. After use, the opened bristle bundles 4 are corrected and restored inward by parting and holding the correction plate 6 and the head 3, by which the bristle bundles are restored to the original straight brush bristles. The brush bristles consist of shape memory resins.