To eliminate the fear of contaminating a manufacturing site or using more than necessary mold release agent by roll coating the surface of an extruded extrusion molding with the agent, or dipping it in the agent, and then press molding it.

An extrusion molding machine 1 has a mold release agent coating roller 2 provided at the end of the machine 1, a free roller 3 provided at a predetermined interval at the front of the roller 2, and molds a long molding 4. Hydraulic organic material is extrusion molded by the machine 1, the surface of the molding 4 is roll coated with the agent by the roller 2 or the molding 4 is dipped in the agent to coat the surface of the molding 4 with the agent, and then press molded. Thus, since the molding is coated with the agent by the roll or dipping, the scattering amount of the agent can be reduced as compared with a spray coating method.