To improve appearance of a storage cabinet and make the maximum use of storage efficiency and allow a variety of formations.

Several kinds of cabinet units 1, which are an high (n stands for a natural number), are bm wide (m stands for a natural number) and are c deep, are combined up down and right left. Base units 2, Cap units 3 and veneer board units, whose size respond to the size of the cabinet units 1, are also combined as occasion demands. Halfway-penetrated punch holes are provided on the upper side of each cabinet unit 1 to connect the upper tier cabinet units 1 with the cap units 3 and the veneer board units. Halfway-penetrated punch holes are also provided on the sides to connect the side cabinet units 1. Penetrated holes are provided on the bottom to connect the base units 2 and the bottom tier cabinet units 1. One or more cabinet units 1 are formed as shelves 1A whose sides are opened forward and backward in the direction of the depth.