To readily produce butter.

This apparatus for producing butter has a main body including a motor in the interior, ribs 6 formed in a vessel 3 mounted on the main body 1, and a rotor 7 rotatably driven by the motor in the vessel, and rotating nearly in parallel to the bottom surface of the vessel 3. The method for producing the butter comprises inserting a material comprising water or a saline solution and a fresh cream in a vessel 3 having the ribs 3 formed on the inner surface, and stirring the material by the rotor 7 rotating nearly in parallel to the bottom surface of the vessel 3 to separate the material to provide the objective butter.