To provide a magnetic fluid pump capable of surely realizing reduction of weight and size to stably secure intended force-feed and controllability of a liquid and causing no problem in use in the artificial heart while solving the problem of heat generation and entering of foreign matter such as dust by using a magnetic fluid (lump) instead of a solid valve.

A rotor and a rotary cylinder in which permanent magnets are arranged so that a plurality of confronting magnetic poles different in phase face to each other are provided on the central side and outside of a cylindrical pressure generating part formed by two or more-turns spiral pipe having an inlet and a discharge port at both end parts. The rotor and rotary cylinder are simultaneously rotated, whereby a magnetic fluid in the spiral pipe is attracted between the magnetic poles of the rotor and the rotary cylinder to form a magnetic fluid lump, and an intended liquid is clamped between the front and rear magnetic fluid lumps and spirally moved in rotation to be discharge.