PROBLEM TO BE SOLVED: To provide a weighing device capable of automatically and reliably measuring a supply amount of a low temperature liquefied gas to a destination from a tank lorry.SOLUTION: The weighing device includes: a strain sensor 18 for detecting a strain amount of an axel 17 caused by a change of a low temperature liquefied gas amount inside a tank of a tank lorry 11; control means 19 having calculation means 21 for calculating a supply amount of the low temperature liquefied gas amount based on a change of the strain amount detected by the strain sensor 18; slip issuing means 20 for issuing by printing on a slip information including a supply amount of the low temperature liquefied gas to a destination calculated from a weight change of the low temperature liquefied gas by the calculation means 21; manual operation means 22 for manually indicating a calculation operation start and a calculation operation completion of the calculation means 21; and automatic operation means 23 for automatically indicating the calculation operation start and the calculation operation completion of the calculation means 21 in association with a turning operation of an ignition key 25. The control means 19 includes switching means 24 for controlling the indication of the automatic operation means 23 and the indication of the manual operation means 22 for switching the indications.
