Abstract: In a magnet pump in which a cylinder 4A integrated with a drive shaft 3A and provided with a drive magnet M1 on the inner circumferential side thereof is disposed outside a cylindrical can 2A having a bottom and secured to a pump casing 1A, and a rotor 6A concentrically fitted over an impeller shaft 5A and provided with a driven magnet M2 on the outer circumferential side thereof is disposed inside the can 2A, and the rotor 6A rotates integrally with an impeller 7A around the impeller shaft 5A as the drive shaft 3A rotates, by virtue of a magnetic attraction force generated between the drive magnet M1 and the driven magnet M2, wherein the sliding contact members of the pump, a bushing 81, a sleeve 82 and a thrust ring 83 interposed in each of the bearing sections 8fA and 8rA for the impeller shaft 5A, are made of ceramic or cemented carbide and have a diamond-like carbon film.