PURPOSE: To reliably separate from a next stage tray the uppermost stage empty tray among the stacked trays for electronic parts.

CONSTITUTION: Of the trays 2, 2',...2" stacked each with a large number of electronic parts such as IC 1 being received therein, the uppermost stage tray 2 has its internal parts taken out. When, thereafter, the empty tray 2 is sequentially moved by a transfer means such as an attraction head 14, a high pressure air is supplied between the empty tray 2 and the next stage tray 2'.