When a device functioning as at least one of a device supplying an item necessary for mounting work to be performed on a circuit substrate, a device discharging an item unnecessary in the mounting work, and a device performing processing required for the mounting work is defined as a mounting work-correspondence device, an electronic component mounting machine 10 includes a receiving section 86 that receives a first mounting work-correspondence device including a moving mechanism moving to an arbitrary position on a floor and a device pallet 70 (a mounting stand) on which a second mounting work-correspondence device is detachably mounted. The device pallet and the receiving section are disposed at a predetermined edge portion of a base 46. Accordingly, since an operator can perform the exchange, maintenance, and the like of the mounting work-correspondence device at a predetermined edge of the base, convenience is improved significantly.