The invention provides a thermoplastic resin moulding material whose quality and value are substantially equal to that of the original resin mould, by adding a recycle aid agent to the resin material to be recycled. The recycle aid agent comprises an olefin group rubber and/or acrylic rubber having graft-copolymerised thereto monomer(s) the same as or similar to monomer(s) of the thermoplastic resin moulding material, to give the rubbers compatibility with the thermoplastic resin moulding material. Recycled thermoplastic resin moulding material is provided having quality and value substantially equal to those of the original thermoplastic resin moulding material.