Method of manufacturing an elastomeric sheath conjugate fiber

The present invention is strength, to provide a method of manufacturing a superior conjugate fiber stretch elasticity and transparency. A method of manufacturing a conjugate fiber, (1) permanent elongation has stretch elasticity with the elastomer resin (A) having stretch elasticity is 25% to 70% and a tensile elongation of elastomer resin having a 100~800% (B ) and in the melt, respectively, the die having two composite spinneret, a step of composite spinning so as elastomer resin (a) is an elastomer resin (B) is a sheath portion in the core portion, (2) step (1) in a step of heat treating the fibers conjugate spinning, and (3) a step method for producing a conjugate fiber characterized in that it comprises a step, for stretching a heat-treated fibers (2).