To provide a control device capable of reducing an unpleasant feeling imparted to a user by the occurrence of chattering of a valve element, in the control device of the electric flow control valve having the valve element for freely contacting with/separating from a valve seat in a valve casing and a motor for moving the valve element to the closing side for approaching the valve seat and the opening side for separating from the valve seat.

A control device of an electric flow control valve includes a detecting means 5 for detecting chattering of a valve element 3, and quickens a rotating speed of the motor 4 more than a steady rotating speed being a motor rotating speed when moving the valve element 3 in a state of not detecting the chattering, when the chattering is detected by the detecting means 5 during movement of the valve element 3.