Abstract: A plurality of building members and a plurality of sheet members for connection thereof are provided. Each of the plurality of building members includes a main body portion and a coupling portion to be fitted on an end of the main body portion. One of the ends of the main body portion and the coupling portion is provided with a small diameter portion and the other of them is provided with a hole for receiving the small diameter portion. Each of the sheet members has a plurality of openings for passing the small diameter portion therethrough. The small diameter portion is passed through the opening of the sheet member and inserted into the hole to sandwich the coupling sheet member between the main body portion and the coupling portion to thereby fasten the building member comprised of the main body portion and the coupling portion to the coupling sheet member. In this way, a desired ornamental article can be created.