<p>A cap for use in an extrusion molding head that reduces the friction between molding rubber for cord coating molding or extrusion molding and inner wall surface of passage within the cap so as to increase the speed of extrusion molding. At part of an upstream region of rubber molding passage (2) extending to distal end outlet (4) from rubber stay part (3) within die main body (1), there is disposed fluid feeding hole (8) for feeding of a fluid into an interstice between the inner wall surface of passage and the circumferential surface of molding rubber (R1) within the rubber molding passage (2) so that the pass resistance of molding rubber (R1) on the downstream side is reduced by the fluid.</p>
