PROBLEM TO BE SOLVED: To provide a gardening and interior material having a light weight and easy for assembling and disassembling. SOLUTION: This gardening and interior material having a light weight and easy for assembling and disassembling is obtained by using a plastic composite material, forming a hollow box-formed block and making a projected part of an opposing surface to the opening part with a rib in the hollow of the opening part as fittable. COPYRIGHT: (C)2009,JPO&INPIT