PURPOSE: A method for manufacturing a bio-degradable coffin is provided to reduce manufacturing costs by reducing the used amount of bio-degradable resin composition, and to easily burn a bio-degradable coffin. CONSTITUTION: A method for manufacturing a bio-degradable coffin is as follows. A bio-degradable resin composition containing Poly Latic Acid is prepared. Assembling grooves(G) or assembling protrusions are formed on one surface of an assembly member using the bio-degradable resin composition. The assembly member with through holes(H) is injection-molded. Sheet papers composed of bio-degradable resin are adhered to the outer surface of a coffin body and a cover.
