The disc brake device comprises a piston (5) designed to press a pad (8) against a disc (2) when said piston is subjected to a first force along a first axis (z′z) in a direction directed from the piston toward the pad. A first plate (12, 13) is inserted between a first surface (52) of the piston (5) and the pad (8) and designed to generate a second force along the first axis (z′z) in a direction directed from the pad toward the piston when the pad (8) is caused to move as a result of rotation of the disc (2.