A manufacturing method for an electric motor stator includes an injecting step in which thermosetting resin is injected into a forming die, a dipping step in which a coil end portion is dipped into the thermosetting resin injected into the forming die, a heating step in which the thermosetting resin inside the forming die is heated so as to form a molded portion, and a mold release step in which the molded portion is released from the forming die when at least either shear force of the thermosetting resin or adhesive strength between the coil end portion and the thermosetting resin becomes greater than previously-determined mold release force.