A method of mounting parts, e.g. electronic parts, which includes the steps of supplying parts to a predetermined position by receiving the parts from part supply sections through a part transfer section of a circulation moving type having a plurality of part holding members, and mounting the parts by receiving the parts as supplied by the part transfer section at the predetermined position. The part holding members which are not used in the plurality of part holding members are classified so that the corresponding part holding members are controlled so as not to be used based on the classification. The consecutive steps of the electronic parts mounting method are illustrated in FIG. 1 of the drawings.