There is provided a method of manufacturing a medical linear member which is not worn when manufactured and which has a flat cross-sectional shape. The method of manufacturing a medical linear member includes a step of forming a first spiral body 1 whose cross-sectional shape is a substantially substantially perfect circular shape by spirally winding a base body 3 having a plurality of arrayed wires 2 formed of a shape memory alloy, around a winding core 4, a step of performing a first shape memory process on the first spiral body 1, a step of cutting the first spiral body 1 into a first predetermined length, a step of removing the winding core 4 from the cut first spiral body 1, a step of forming a second spiral body 6 whose cross-sectional shape is a flat shape by compressing the first spiral body 1 in a diametral direction, and a step of performing a second shape memory process on the second spiral body 6.
