BRAKE CALIPER

A brake caliper (100) has a fixed seat (10). The fixed seat (10) has a first brake lining (41) and a second brake lining (42). The fixed seat (10) further has a first piston (21) and a second piston (22) that can be pushed by hydraulic oil. A movable seat (50) is slidably disposed on the fixed seat (10). The movable seat (50) has a link portion (54) that can link the first brake lining (41) and a drive unit (60) that can push the second piston (22) mechanically. The first piston (21) and the second piston (22) can be pushed hydraulically to drive the first brake lining (41) and the second brake lining (42) for braking. The drive unit (60) pushes the second piston (22) to drive the second brake lining (42), and pushes the movable seat (50) to drive the first brake lining (41) for braking. The caliper further comprises a cover (30) disposed on an outside of a piston hole (15), an inner wall surface of the cover (30) having a blocking portion (32) extending toward the piston hole 815), the blocking portion (32) being formed with at least one perforation (33).