To provide an expansion assembly type human body-shaped model form CAD for generating an expansion assembly type expansion diagram according to an individual body by solving the problem that an individual human body shape dealing form depends on gypsum pouring and cutting, and that the cutting time, storage place and discard place are turned into nuisances.

At first, a basic model constituted of curved surfaces which are turned to be flat surfaces when expanded or flat surfaces is prepared, and the respective faces are defined as the gathering flat surfaces of triangular polygons, and made flat, and combined so that an expansion assembly type expanded diagram can be created. When the basic model-shaped polygon which is the same as an assembly finish status is deformed according to the body shape of an individual person, the expanded diagram is changed following this. Thus, it is possible to instantaneously obtain an expansion assembly type human body shape model form expanded diagram corresponding to the body shape.