Abstract: [Problem] To provide a toothbrush, in which illumination of an interior of an oral cavity enables an assistant to grasp the state of the interior of an oral cavity of a person being assisted, and an uncomfortable strike against the interior of an oral cavity caused by a portion made of a hard material can be prevented as far as possible during brushing. [Means for Resolution] A toothbrush 10 comprising a head portion 31 formed on a surface thereof with a brush portion 55, a toothbrush body 11, and a shaft 25 that connects the head portion and the toothbrush body, the toothbrush body being provided with light emitting means 21 to irradiate light toward the head portion, the shaft being formed to permit the light to transmit therethrough, at least a surface of the head portion being formed with elastic portions 34, 36, and a tip end of the head portion being not formed with the elastic bodies and thereby provided with a tip-end light transmitting portion 37.