PURPOSE: To improve a contents dispensing property and the strength of a dispensing opening by drawing upward a metal material in the vicinity of a hole after forming the hole in the top part of a container and next forming a female thread in the inside after compressing an annular shoulder downward.

CONSTITUTION: The top part 11 and the annular shoulder part 35 are formed in a drum container by the use of a die device or the like. At this time, first the hole 36 is formed in the drum top part 11 via the die, and next the metal material in the top part 11 is drawn from the horizontal surface 23 toward the upward direction. At this time, the shoulder part 35 is formed and the thickness is formed into the same or more thickness as that of the top part 11. Next, a female thread 37 is threaded in the inside of the shoulder part 35 by the use of a thread forming tap. Since the threaded dispensing opening is formed with the only metal material in the drum top part, another fixing parts are not necessitated. Thus, the torque resistance and the strength of the dispensing opening are improved and the contents dispensing property is also improved because of flatness in the inner surface.