The invention provides a manufacturing method of an armature having high universality. By adopting the manufacturing method, the adverse shape of the armature, and various problems caused by the adverse shape of the armature are improved, and the method is used for all kinds of steels plates with all laminated steel cores. Permanent magnets in an unmagnetized direction are inserted in a plurality of magnet inserting holes 61 of the laminated steel cores 6, and resin materials are injected in the magnet inserting holes 61, and the resin materials are solidified in the magnet inserting holes 61, and the permanent magnet is fixedly disposed on the laminated steel core. According to the manufacturing method, the laminated steel core 6 is heated, and when the laminated steel core 6 is at a temperature in a specific temperature range, the resin materials are injected in the magnet inserting holes 61, and then the laminated steel core 6 is at the temperature in a specific temperature range different from other temperature ranges, the resin materials are injected in other magnet inserting holes 61.