PURPOSE: To provide a tooth brush which polishes the teeth in the growing direction of the teeth and enables an infant and adult to easily polish the teeth for a long period of time.

CONSTITUTION: The tooth brush for deep teeth is provided with hairs 5 on the two or three surfaces countering the inner side of a U-shaped tooth brush body 1 and is provided with a handle or cord 10 of the tooth brush at need. An elastic material 2 assists returning after chewing to continue the motion of the brush. The surface of the elastic material is provided with a plate or a spring is used to improve returning after chewing. The tooth brush for the foreteeth is provided with the hairs on the two faces countering the inner side of a U-shaped tooth brush body having opened ends in such a manner that the hair tips are narrower along the equal two sides of an isosceles triangular shape nearer the deep side. The purpose thereof is to create the shape meeting the cross-section shape of the teeth. The tooth brush is provided with the elastic material, spring part and plate at need in its deep part.