To provide a toothbrush in which a head portion and a stem portion are formed separately, a toothbrush which can be stably used without rotating the head portion during tooth brushing.SOLUTION: The head base 30 of the toothbrush 1 has a cross-shaped concave portion 31 on the front side and has a through hole 32 penetrating in the thickness direction of the head base 30 in the cross shape central portion, and the head portion 20 Has a crosspiece-shaped convex portion 23 that is implanted in one principal face 21 on the other principal face 22 and can be engaged with the concave portion 31, projects in the thickness direction from the cross-shaped center portion, 30, the bolt portion 24 is inserted through the through hole 32 from the front side of the head base 30, and in a state in which the protruding portion 23 is engaged with the recessed portion 31, the bolt portion 24 Is fixed by a cap member 60 inserted into the through hole 32 from the back side of the head base 30.BACKGROUND OF THE INVENTION【課題】ヘッド部と柄部が別体で構成された歯ブラシにおいて、歯磨き中にヘッド部が回転せず安定して使用できる歯ブラシを提供する。【解決手段】歯ブラシ1のヘッド台30は、正面側に十字状の凹部31を有するとともに、十字状の中心部においてヘッド台30の厚さ方向に貫通する貫通孔32を有し、ヘッド部20は一方の主面21に毛束10が植毛され、他方の主面22に凹部31と嵌合可能な十字状の凸部23を有するとともに、十字状の中心部から厚さ方向に突出しヘッド台30の貫通孔32に挿通可能なボルト部24を有し、ボルト部24がヘッド台30の正面側から貫通孔32に挿通され、凸部23が凹部31と嵌合した状態で、ボルト部24はヘッド台30の背面側から貫通孔32に挿入されたキャップ状部材60で固定されている。【選択図】図1
