To shorten processing time, while being low in cost by minimizing the number of head sections which perform processings.

A processing station 4 includes a plurality of holding tables 14a and 14b for holding a substrate P, and the head section 24 which mounts an electronic component on the substrate P held by the holding tables 14a and 14b. Furthermore, the processing station further includes a transfer section 10, which discharges the substrate P held by one holding table 14a out of the plurality of holding tables, after a mounting process is finished by the head section 24 and then supplies it to a processing station 5 for the next process. When the transfer section 10 discharges the substrate P, the head section 24 executes mounting processing for the substrate P, held by the second holding table 14b between the plurality of holding tables 14a and 14b.