When a device that functions as a device for supplying what is necessary for mounting work with respect to a circuit substrate and/or functions as a device for discarding what is not necessary for the mounting work and/or functions as a device that performs a process required for the mounting work is defined as a mounting-work-related device, an electronic component mounting machine (10) is equipped with a housing unit (86), which is for housing a first mounting-work-related device having a movement mechanism that enables movement to any position on a floor, and a device pallet (mounting stand) (70), which is for mounting a second mounting-work-related device in a removable manner, with the device pallet and the housing unit being arranged at a specific edge part of a base (46). Thus, a worker is able to replace a mounting-work-related device, perform maintenance, and the like at the specific edge part of the base, which significantly increases the convenience.