PURPOSE: To support a plan and control of a schedule of stacking work by displaying a result after carrying out simulation related to stacking time.

CONSTITUTION: A stacking plan support device has a memory 2 to store beforehand specification data related to a container and a cargo group, an input device 3 to input stacking plan time and the number of stacking plan containers, a data input part 10 to process inputted data, a loading efficiency index value operation part 11 to carry out operation on an index value of loading efficiency such as the total number of cargoes, a utilization factor of a plane and a capacity rate, a necessary time or the like operation part 12 to carry out operation on necessary stacking time for the number of plan containers or the number of containers capable of stacking in plan time when the operation is carried out on the index value of the loading efficiency and a data display part 13 to out put an operation result, and also has an operation control device 1 composed of a stacking pattern creating part 14 to create the optimal stacking pattern and a data display device 4 to display an operation result of the operation control device 1.