The invention discloses a T-shaped toothbrush, which comprises a handle, a brush hair base and brush hairs, wherein the brush hairs are arranged on the brush hair base; the handle is connected with the brush hair base in a T form; the brush hair base is crescent; and the end parts of the brush hairs are of accordant heights. In the T-shaped toothbrush disclosed by the invention, the handle is connected with the brush hair base in a T form, and the brush hair base is crescent, so that stains in slits among teeth can be cleaned conveniently without damaging the surrounding tissues of teeth; and meanwhile, the conventional tooth brushing way is changed, and the brush hairs can be used for brushing teeth along the slits among teeth, so that the tooth brushing way is reasonable and scientific, periodontal tissues are prevented from being damaged, and blocking objects and deposited dirt in the slits among teeth can be cleaned completely.