To provide a painting brush with such durability that resilience can be maintained over a long period of time especially.

A brush part 2 includes straight bristles 55-65 (wt.%) comprising PET (polyethylene terephthalate), wavy bristles 10-20 (wt.%) comprising chemical fibers, and hog bristles 5-30 (wt.%), at least the hog bristles are made shorter than the other bristles, and the resilience of the brush part 2 is maintained by the straight bristles comprising PET (polyethylene terephthalate) and the hog bristles.