PURPOSE: To provide a drilling method for work and a device therefor which can simplify the constitution for carrying-in and -out works or products and facilitate incorporation into after-process by drilling the works one by one without drilling the stacked works.

CONSTITUTION: The works stacked on a raw material stocker 5 disposed on one side of a drilling machine 3 are carried in a drilling machine 3 while sliding the works one by one. After drilling work by the drilling machine 3, processed products are carried out and stacked while being slided to a product stocker 7 disposed on the other side of the drilling machine 3.