| 摘要 |
Provided is a toothbrush that can satisfactorily clean an interdental region and a tooth cervix as well as a tooth surface and an occlusal surface of a molar. A toothbrush (1) has two or more bristle bundles implanted in an implantation surface (20) of a head part (2), each of which bristle bundles comprising two or more bristles. The toothbrush (1) is provided with a first bristle bundle cluster (30) and a second bristle bundle cluster (40). The first bristle bundle cluster (30) has at least one implanted first bristle bundle (32); and the second bristle bundle cluster (40) has a second bristle bundle (42) implanted around the first bristle bundle cluster (30), and opening toward a distal end or a proximal end of the head part (1). The length of the first bristle bundle (32) is shorter than the length of the second bristle bundle (42), and the buckling strength of the first bristle bundle (32) is lower than the buckling strength of the second bristle (42).
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