To provide a servo moving device capable of canceling inertia force to be transmitted from a mobile object to an inertia force receiving member.

A component supply table 32 is moved by a feed screw 40, a nut and a 1st servo motor and plural component feeders 30 are successively moved to the component supplying position. A solid cam 68 is arranged in a casing 60 fixed to a base board 10 so as to be rotated around an axis parallel with the moving direction of the table 32 and a flywheel fixed to a roller gear 80 is rotated through the cam 68 and the gear 80. At the time of moving the table 32, 1st and 2nd servo motors 74 are started, the flyweel is rotated in accordance with the movement of the table 32 and inertia force having the same value and reverse direction as/against inertia force applied due to the movement of the table 32 is applied to the base board 10 through the cam 68 and the casing 60.