PURPOSE: To simplify operation and to shorten an accurate weighing time, by providing a drain hole to a cup so as to locate the same below the lowermost graduations line of plural graduations lines provided to said cup in an up-and- down direction.

CONSTITUTION: Graduations lines 1aW1c are engraved to the side surface of a cup 1 in an up-and-down direction and a drain hole 1d is provided to the bottom part of the cup 1 so as to be positioned below the line 1C. For example, when water is weighed by a 3/4 cup, the hole 1d is closed by a finger 2 and water is injected in the cup 1 and drainage is performed by using the hole 1d while the position of the line 1a is confirmed by an eye 3 from a lateral or upper direction and, when a water level reached the line 1a, the hole 1d is closed by the finger 2 to finish weighing.