PURPOSE:To promote the stabilization of action for supplying a lubricant, by containing a power source part, which supplies electric power for driving a motor, and a control circuit part, which controls the motor to be driven, to be built in a lubricant delivery mechanism part. CONSTITUTION:In order to actuate a plunger 13 reciprocating, a lubricant delivery mechanism part 2 is mounted to one end side of a pump main unit 1. A motor 16, power source part 15 for supplying electric power to the motor 16 and a control circuit part 24 controlling the motor 16 are housed in said mechanism part 2. The power source part 15, which actuates the control circuit part 24 and drives the motor 16, forms an independent electric system, and it is prevented from easily receiving an influence of power source noise from the other machine.