A nozzle manufacturing method of a combustor is provided to reduce time and manufacture cost and remove partial defects, necking, and instability of material. A nozzle manufacturing method of a combustor comprises: a step(a) preparing an outer cover of a cylindrical shape being made of stainless steel material and an inner cover of the cylindrical shape being made of copper alloy material; a step(b) processing the outer cover, and cutting the outer cover in order to be bisected in an axial direction to form an inner cover insertion part; a step(c) processing the inner cover in order to have the same external diameter as the inside diameter of the inner cover insertion part; a step(d) inserting the inner cover into the inner cover insertion part and assembling the outer cover and the inner cover; a step(e) brazing the cut part of the outer cover; and a step(f) processing the outer cover in order to have the final contour the outside shape of the outer cover.
