PURPOSE: To reduce the number of electronic components in stock that arise on manufacturing circuit boards and reduce the necessary space and increase the mounting speed, by storing a plurality of kinds of electronic components in one reel on the basis of the mounting order onto a circuit board.

CONSTITUTION: Respective 2-pc., 2-pc., 2-pc., 1-p of Four kinds of chip condensers C1-C4 having the same size but different capacities, respective 2-pc., 2-pc., 2-pc., 1-pc., and each one of three kinds of chip resistance R1-R3 having the same size with the chip condenser but different resistances, are regarded as one unit, n1, n2,... corresponding to one sheet of circuit board. These chip condensers C1-C4 and the chip resistances R1-R3 re repeated in the mounting order to store them in a packing belt. This obtained packing belt is rolled up to make a reel. In an automatic mounting for instance, the chip condensers C1-C4, and the resistances R1-R3 are picked up and mounted in the order of storage by a vacuum suction collet and circuit base boards are repeatedly assembled.