To provide an L-shaped countertop with various added values by lightening it to make a structure support needless, enhancing its workability, giving durability, making the appearance gorgeous and the like.

For this countertop, a flash panel, a plywood/wood or the like is used as a core to lighten the weight, heighten the bending strength and improve the workability. The countertop is made to be fixed with screws. An artificial marble is integrally molded for enhancing the water resistance and durability. This L-shaped counter top is integrally molded.