A clutch cover assembly equipped with a diaphragm spring (8), which is intended to prolong a service life of a clutch by making it possible to automatically maintain an initial setting load according to a wear amount of a facing (6). For this purpose, fulcrum rings (14, 15) are divided into inside and outside pieces, fitted in a pressure plate (7) in such a manner as movable in an axial direction, and pressed to the diaphragm spring (8) side through annular spring receiving plates (38, 39) by inside and outside pressing springs (31, 32). Annular lock wires (16, 17) movable in the axial direction are disposed between the fulcrum rings (14, 15) and the pressure plate (7), and lock springs (26, 27) weaker than the foregoing pressing springs (31, 32) are compressively installed between the lock wires (16, 17) and the spring receiving plates (38, 39), so that axial return motions of the fulcrum rings (14, 15) are locked.