To provide a toothbrush using a thermoplastic elastomer for a toothbrush handle, excellent in mobility, and improved in adhesivity to dentition, and comfortably touching to teeth and gums when compared with conventional toothbrushes, while excellent in handleability and fit feeling at the time of brushing.

A toothbrush wherein either one of a head part 1, a neck part 2 or a grip part is formed out of a hard resin part 4 and a flexible resin part 5 made from the thermoplastic elastomer. The thermoplastic elastomer is constituted of a polystyrene block and a polyolefin block, and a styrene elastomer wherein olefin consists of ethylene and propylene structures, is used. As the hard resin part 4, a polyolefinic resin whose flexural modulus (ASTM D790) is 1000 MPa to 2000 MPa, is used, and the hardness of the thermoplastic elastomer (JIS K6253, Type A) is ranged from 10 to 60.