An electric motor assembly, comprising: an impeller; a guide vane disposed at one side of the impeller along an axial direction, the guide vane comprising a plurality of vanes; a stator disposed at one side of the guide vane along the axial direction; a rotor rotatably disposed with respect to the stator and configured to rotate the impeller; and a frame coupled to an outside of the stator along a radial direction, characterized in that the frame comprises: a body having a cylindrical shape, disposed at the outside of the stator, and provided therein with an air flow path; and a plurality of stator fixing parts protruding from an inner surface of the body so as to be coupled to the stator, wherein the plurality of stator fixing parts is disposed to be inclined with respect to the axial direction, an inner surface of each of the plurality of the stator fixing parts has a cross section with an arcuate shape so as to be in surface contact with a circumferential surface of the stator core, wherein the plurality of vanes and the plurality of stator fixing parts are disposed to be inclined in substantially the same direction, and one or both side surfaces of each of the stator fixing parts are inclined with respect to the axial direction so as to correspond to air moved by rotation of the impeller. an impeller; a guide vane disposed at one side of the impeller along an axial direction, the guide vane comprising a plurality of vanes; a stator disposed at one side of the guide vane along the axial direction; a rotor rotatably disposed with respect to the stator and configured to rotate the impeller; and a frame coupled to an outside of the stator along a radial direction, characterized in that the frame comprises: a body having a cylindrical shape, disposed at the outside of the stator, and provided therein with an air flow path; and a plurality of stator fixing parts protruding from an inner surface of the body so as to be coupled to the stator, wherein the plurality of stator fixing parts is disposed to be inclined with respect to the axial direction, an inner surface of each of the plurality of the stator fixing parts has a cross section with an arcuate shape so as to be in surface contact with a circumferential surface of the stator core, wherein the plurality of vanes and the plurality of stator fixing parts are disposed to be inclined in substantially the same direction, and one or both side surfaces of each of the stator fixing parts are inclined with respect to the axial direction so as to correspond to air moved by rotation of the impeller. a body having a cylindrical shape, disposed at the outside of the stator, and provided therein with an air flow path; and a plurality of stator fixing parts protruding from an inner surface of the body so as to be coupled to the stator, wherein the plurality of stator fixing parts is disposed to be inclined with respect to the axial direction, an inner surface of each of the plurality of the stator fixing parts has a cross section with an arcuate shape so as to be in surface contact with a circumferential surface of the stator core, wherein the plurality of vanes and the plurality of stator fixing parts are disposed to be inclined in substantially the same direction, and one or both side surfaces of each of the stator fixing parts are inclined with respect to the axial direction so as to correspond to air moved by rotation of the impeller.