To provide a car-washing brush which causes no damage to the body of a vehicle and is high in washing ability and excellent in durability.

The car-washing brush 10 comprises; a plurality of strip-like washing chips 12, whose tip parts plurally branch (n crotch branches (n: an integer larger than 1)) or do not branch; and a mounting body 18 in which holes 14, 16 for mounting the car-washing brush on a car washer are formed. The car-washing brush 10 is used as a car-washing brush at a gas station. The car-washing brush 10 comprises a car-washing foam including a soft vinyl chloride resin and contains a plasticizer of at least 37.5 mass% and at most 50 mass%.