Abstract: A method for producing an optical fiber cord or an optical fiber cord tape, making it possible to produce optical fiber cords or optical fiber tape cords of large or small bores in a highly efficient manner, comprises the steps of placing a replaceable line 2 at the center, arranging resilient fibers 3 around its periphery, and covering the assembly with a jacket 4, to produce a dummy cord 1; exposing, at both ends of dummy cord 1, the ends of replaceable line 2 and of resilient fibers 3 from the ends of jacket 4; connecting one exposed end of replaceable line 2 with an optical fiber core line 5 or a unit core line 7 of an optical fiber tape cord; and replacing the replaceable line 2 in dummy cord 1 with the optical core line 5 or unit core line 7.