To provide a washing brush piece for a car washing machine, a brush and a car washing machine capable of ensuring flexibility and strength of the brush piece, reducing manufacturing cost and increasing washing effect.

In the brush piece of the washing brush for the car washing machine for washing an automobile or for washing a vehicle, the brush piece of the washing brush for the car washing machine has a plurality of brush members A, B, is formed with slits 1, 1a, and is formed with an insertion part fitted with the plurality of brush members A, B through the slits 1, 1a.