PURPOSE: To provide an extrusion molding cap of an inorg. product eliminating the trouble of the clogging with a kneaded material within a mold even when a long reinforcing fiber is used and capable of imparting a recessed stripe with arbitrary depth in the extrusion molding of the inorg. product.

CONSTITUTION: Block elements 2...2 forming recessed stripes on the surface of a molded product G along the axial line P inclined forwardly with respect to an extrusion direction are supported on the inner surface 1A of an extrusion molding cap 1 to which a kneaded material composed of a cement compound is supplied so as to be freely advance and retreat and the separation of hooked fibers is facilitated by the oblique movement of the block elements and recessed stripes with arbitrary depth are formed by the positional control of the block elements 2...2.