A toothbrush which is compatible with various functional appeals of a toothbrush, has an appeal effect-exhibiting appearance, and is high in degree of design freedom. The toothbrush comprises a head unit (12) having a plurality of tuft holes (16) provided in its head surface (12a), wherein a brush bristle bundle (13) is folded into two and a wire (15) held between them is driven into the tuft hole(16), whereby the bristle bundle (13) is planted into the tuft hole (16). A bristle bundle group (20) constituted of at least three bristle bundles (13) is provided on the head surface (12a) of the head unit (12), and the direction of a wire (15) in each of bristle bundles (13) constituting the bristle bundle group (20) is set to a direction in which one enclosed area is sectioned by the extension line of each wire (15) or a direction in which an area held between the extension lines of wires is sectioned.