A tooth brush which is excellent in durability and can give a high massaging effect to a person even with weak gum with a low stimulus and without damaging the gum in various tooth brushing methods, especially in a Bass method. The toothbrush comprises bristles (4) tufted on an toothbrush head (20), wherein thermoplastic elastomer bristles (41, ----) are tufted in the inner portion (R1) in a width direction of the toothbrush head (20) and synthetic resin bristles (42, ----) harder than the thermoplastic elastomer bristles are tufted in the both outer portion (R2, R3) in a width direction of the toothbrush head (20) respectively. Especially, each tuft (5) tufted on the toothbrush head (20) is so trimed that bristles (4) are continuously or stepwise shorter from the inner portion to the outer portion in the width direction
