To manufacture initially coned disc springs with better yield and reduced man-hours.

A long strip-shaped material is sent in its longitudinal direction and bent in its widthwise direction to be annularly shaped. It is fitted in a cutting die having a predetermined diameter. An overlapping part of its head and tail is cut to form a strip-shaped and C-shaped member. Both ends of the member are bonded to each other to form an annular strip-shaped member. Then, the annular strip-shaped member is formed into the initially coned disc spring by forming the coned disc spring. The diameter Db of the cutting die is made to be a cutting allowance (t) in cutting plus the diameter of the initially coned disc spring. In this method for forming the initially coned disc spring by forming the strip-shaped material into the annular shape, no punching scrap is generated differently from the case where an annular material is punched out from a strip-like material to have the better yield, nor is a process of flattening a wire rod needed, so that the man-hours are reduced and the high- precision coned disc spring is formed.