To provide a magnet driving pump which can be composed at a relatively low cost and easily, even though the pump is a multistage pump with a long pump shaft, for example, and prevents the damage of a bearing in a lost operation or an air involving operation as little as possible, so as to improve the durability.

In this magnet driving pump, a driving magnet body 13 installed on the inner peripheral surface of a cylindrical case 12 which is connected to a motor shaft 11; and a driven magnet body 16 fixed to a rotor 15 which is rotated integrally with a pump shaft 40; are opposed each other by holding a shell 10 at the center, and at the same time, impellers 20 and 20 rotating integrally with the pump shaft 40 are housed rotatable inside a pump casing 30 having a suction nozzle 31a. In this case, while the pump shaft is composed of ceramic rods 60, 61, and 62, it is divided into plural shafts, and the divided shafts are connected in series so as to compose the pump shaft 40.