A method of manufacturing an armature that includes an armature core provided with a plurality of slots that extend in a center axis direction and a coil portion formed by joining a plurality of segment conductors to each other, the segment conductors comprising end portions and leg portions (42a, 42b), and supplied with multi-phase AC power, the method comprising: a step of preparing first segment conductors, of the segment conductors, which constitute at least one end portion (Nt) of the coil portion for each phase and in which a plurality of the end portions (Nt) are electrically connected to each other; a step of disposing the leg portions (42a, 42b) of the first segment conductors and the leg portions (42a, 42b) of second segment conductors, which are the segment conductors which constitute a part of the coil portion other than the first segment conductors, in the armature core so as to face each other in the center axis direction after the step of preparing the first segment conductors; and a step of joining the leg portions (42a, 42b) of the first segment conductors and the leg portions (42a, 42b) of the second segment conductors to each other after the step of disposing the leg portions (42a, 42b), wherein the step of preparing the first segment conductors is a step of preparing the first segment conductors in which a plurality of neutral point connection end portions (Nt), which are first end portions (Nt), for the individual phases, of the coil portion connected through a Y connection, are electrically connected to each other by joining the plurality of neutral point connection end portions (Nt) to each other, said connected first segment conductors constituting the neutral point-connection segment conductors, characterized in that the step of preparing the first segment conductors is a step of preparing the first segment conductors on which an electronic part is disposed by attaching the electronic part which has a temperature detection element to a neutral point-connection segment conductor, among the plurality of segment conductors. a step of preparing first segment conductors, of the segment conductors, which constitute at least one end portion (Nt) of the coil portion for each phase and in which a plurality of the end portions (Nt) are electrically connected to each other; a step of disposing the leg portions (42a, 42b) of the first segment conductors and the leg portions (42a, 42b) of second segment conductors, which are the segment conductors which constitute a part of the coil portion other than the first segment conductors, in the armature core so as to face each other in the center axis direction after the step of preparing the first segment conductors; and a step of joining the leg portions (42a, 42b) of the first segment conductors and the leg portions (42a, 42b) of the second segment conductors to each other after the step of disposing the leg portions (42a, 42b), wherein the step of preparing the first segment conductors is a step of preparing the first segment conductors in which a plurality of neutral point connection end portions (Nt), which are first end portions (Nt), for the individual phases, of the coil portion connected through a Y connection, are electrically connected to each other by joining the plurality of neutral point connection end portions (Nt) to each other, said connected first segment conductors constituting the neutral point-connection segment conductors, characterized in that the step of preparing the first segment conductors is a step of preparing the first segment conductors on which an electronic part is disposed by attaching the electronic part which has a temperature detection element to a neutral point-connection segment conductor, among the plurality of segment conductors.