To enable the supporting of a top board made of glass in an optional size stably so as to be removable with a leg body regardless of the size of the leg body.

Four top board receptacle supports 31 each with a recessed support hole 37 are provided at four corner parts of the top surface of the leg body 2 having its upper ends linked together with a horizontal framework like frame 7. Protrusions 40 to be supported fastened on four corner parts of the undersurface of the top board 4 made of glass are fitted into the respective support holes 37 to support the glass top board 4 with the top surface of the leg body 2 so as to be removable freely.