One embodiment provides a vehicle disc brake including: a caliper body; a caliper bracket having a pair of caliper support arms; a pair of friction pads; and a pad return spring. Each caliper support arm has a pair of pad guide grooves, and a pair of lug pieces extending from the friction pad are supported movably therein. An outer surface of each lug piece is stepped such that a projecting length on a radially outer side is shorter than a projecting length on a radially inner side, thereby defining a space portion between the lug piece and the pad guide groove. A first imaginary line, which is defined to pass a gravity center of the friction pad and to intersect perpendicularly a center line connecting a center of a disc rotor and a center of a piston, passes the space.