PURPOSE: To make the spread of electron cloud three-dimensionally appealing to visual sensation like a spaced packing type even different from any type of the spaced pack ing type, a skelton type and a sphere-bar type by assembling specific hollow fourteen- faced polyhedrons, etc., as atom models and connecting a plurality thereof, thereby constituting a three-dimensional molecular model.

CONSTITUTION: This three-dimensional molecular model is assembled of two pieces of carbon atom models 10 and six pieces of hydrogen atom models 50. The models 10 and the models 50 are the resembling hollow fourteen-faced polyhedrons composed of the plural planes of resembling hexagonal and square plates. The one side of the planes constituting the models 10, i.e., the respective ridges of the cubes are longer than the models 50 and, therefore, the models 10 are formed larger over the entire part. The hollow fourteen-faced polyhedrons constituting the models 10 have four sheets each of the plane parts of the hexagonal shape. First, the arbitrary plane parts of the hexagonal shape of two pieces of the models 10 are connected by connecting parts. Next, total six pieces of the models 50 are connected to all of the plane parts of the hexagonal shape of remaining three sheets each, by which the assembly is completed. As a result, the molecule form as the spread of a nuclear cloud is expressed and the expression of the coupling angles, coupling lengths, etc., is made possible as well.