The component mounting machine (1) according to the present invention is provided with: a machine base (9); a plurality of replaceably mounted component supply devices (3), each of which has a plurality of component supply units (feeder units 8); a component transfer device (4) which has a set reference level (H0) serving as a reference for raising and lowering a mounting nozzle (suction nozzle 46); a height storage unit (device control unit 38) which stores, for each component supply device, a specific height value (Heg) that is determined on the basis of the unit heights (HL, HC, HR) of thecomponent supply units of the component supply device as measured when the component supply device is mounted in place; and a height correction control unit (control device 6) which, on the basis of the specific height value for the mounted component supply device, corrects the amount of downward stroke to be made by the mounting nozzle to pick up a component. Thus, the component pick-up operationof the mounting nozzle is controlled on the basis of the specific height value for each component supply device, making it possible to comprehensively accommodate errors in the height direction and thereby reliably pick up components.