PURPOSE: To provide a handle of a brush which is easily and efficiently moldable in short cycles, is changeable in the shape of the handle after molding and is good in operability.

CONSTITUTION: A brush body integrally having a head 11 and plural slender split bamboo rod-like members 21 continuous with this head 11 is molded by injection molding of a resin. A core member 30 having a stopping part 32 for stopping the short parts of these slender split bamboo rod-like members 21 and flanged bulging parts 33, 34 parted from each other in a longitudinal direction is molded by the resin. This core member 30 is inserted from the bulging part 33 side into the inner side of the slender split bamboo rod-like members 21 of the brush body 20. The ends of the respective slender split bamboo rod-like members 21 are stopped at the stopping part 32 of the core member 30 and the middle parts of the respective slender split bamboo rod-like members 21 are bulged outward by the bulging parts 33, 34. The handle 12 is composed of such slender split bamboo rod-like members 21 and the core member 30.