A catheter wire includes a wire core including a semi-rigid stainless steel, and a conductor layer covering an outer periphery of the wire core. A method of manufacturing a catheter wire includes drawing a stainless steel in an axial direction so as to form a wire core with a predetermined diameter, annealing the drawn stainless steel so as to change the stainless steel into a semi-rigid stainless steel, and forming a conductor layer on an outer periphery of the semi-rigid stainless steel.
