PURPOSE: To obtain a structure of an extruding part for a reinforcement- containing extruded material in which an intrinsic performance of a reinforcement can be exhibited by the weak adhesion of the reinforcement to a body.

CONSTITUTION: In an extruding part 1, a die 5 is disposed at a tip part 41 of an introducing tube 4 with an insertion tube 31, of the extruding part 1, and a screw conveyor 2 ms provided rearward of the die 5. Furthermore, a conveyor 8 is disposed frontward of the extruding part 1. An extruded material 6 extruded from the die 5 moves in the direction of an arrow. The insertion tube 31 is extended to an outlet 72 of the die 5. In this manner, a reinforcement 7 is extruded simultaneously with the extrusion of a body 61 contained in the extruding part 1. Since the both move at the same speed, the body 61 simply adheres to the reinforcement 7 with a remarkably small adhesive force. As a result, the reinforcement 7 can exhibit its intrinsic performance, and a superior reinforcing performance is obtained.