An electronic components mounting device has a plurality of feeder bases attached with tape feeders thereon, and a guide rail and a cylinder for drawing each of the feeder bases independently to a position for replenishing electronic components. When an electronic component runs out of the storage, only the feeder base that is carrying the relevant tape feeder gone out of the stock is drawn to a place for parts replenishment; in the mean time, the mounting actions keep on going by making use of tape feeders attached on other feeder base. Machine stop times can be decreased with the mounting device.