PURPOSE: To enable the manufacture of electric parts economically with a high working efficiency and an excellent finish appearance through an easier selection thereof, by a method wherein electric parts different in constant are mounted on a mounting part to measure characteristics of an electronic circuit and then electric parts with a desired constant value are selected to be fixed by soldering.

CONSTITUTION: A mounting part 5 is equipped with two sets of holder sections 7 made up of a plate spring of conductor and an insulating member 3 to fasten the lower ends thereof integral. The mounting part 5 is packaged previously between circuit patterns 2 on a circuit board 1. The upper end 7a of the mounting part 5 is formed in a shape of a funnel to facilitate the insertion or removal of an electrode 4a as electric parts 4 intended to measure electric characteristics. Therefore, electric parts 4 different in constant can be mounted on the mounting part 5 repeatedly to accomplish a connection for an electronic circuit as desired, whereby characteristic values thereof are measured. Electric parts 4 with the selected constant are finished in work by soldering the electrode 4a on the holder sections 7 completely.