PROBLEM TO BE SOLVED: To provide a gravity center position measurement device that can measure a three-dimensional gravity center position of an object to be measured which is selected out of a plurality of candidates for the object to be measured including a vehicle single body, loads, and a whole container storing these loads.SOLUTION: A gravity center position measurement device 1 determines, as an object to be measured, one of a plurality of candidates for the object to be measured including a vehicle 3 single body, loads 10, and a whole container storing the loads 10 in a container 3c, and measures a three-dimensional gravity center position of the object to be measured. The gravity center position measurement device 1 includes: a memory 68 which stores a mass and three-dimensional gravity center position information on the plurality of candidates for the object to be measured other than the selected object to be measured among the plurality of candidates for the object to be measured; and a MPU 69 which
