A clutch rolling bearing centered on a central axis. The clutch rolling bearing includes a rotatable ring provided with a toroidal portion defining a first concave raceway and an engagement portion dedicated to cooperate with a diaphragm, a stationary ring mounted coaxially with the rotatable ring, provided with a toroidal portion defining a second concave raceway and dedicated to cooperate with a translating piston, and balls arranged between the first and second concave raceways of the rotatable and stationary rings. The engagement portion of rotatable ring extends from the toroidal portion on the diaphragm side, the engagement portion being folded against the toroidal portion on a surface radially opposite to the first raceway.