PURPOSE: To pack automatically by combining many different kinds of parts by a method wherein a plurality of feeders are arranged corresponding to the kinds of parts and a detecting part is mounted at tip end of each of their shoots.

CONSTITUTION: When parts are screws, washers and nuts, the screws are stored in a first feeder 10, the washers are in a second feeder 11 and the nuts are in a third feeder 12. When a start signal is inputted, the feeders 10, 11 and 12 all start to feed the respective parts to their shoots in lines. The screws, washers and nuts thus fed pass respective detecting parts 23,24 and 25 and enter a guide cylinder 2 through an entrance 2a. At this time, the respective parts are counted. When the count number reaches a prescribed value, the feeders 10, 11 and 12 all stop, and successively a shutter of a receiving box 3 at a lower end of the guide cylinder 2 opens, so that all the parts enter a bag of a packing device. Thus, the screws, washers and nuts are put into the bag, and the bag is sealed and exhausted.