Electric supercharger

An electric supercharger comprising:

• a housing including a peripheral wall that has a cylindrical shape,
• a rotary shaft housed in the housing;
• an impeller connected to an axial end of the rotary shaft;
• and
• an electric motor that is housed in the housing and rotates the rotary shaft, wherein the electric motor includes a stator in which a coil is wound, wherein the stator includes a stator core having a cylindrical shape, and a first coil end and a second coil end that are parts of the coil and project from both end surfaces of the stator core located in an axial direction of the rotary shaft,
• wherein
• the peripheral wall includes
• a plurality of first oil supply holes through which oil flows and that are opened on an inner peripheral surface of the peripheral wall at positions overlapping the first coil end in a radial direction of the rotary shaft, and
• a plurality of second oil supply holes through which oil flows and that are opened on the inner peripheral surface of the peripheral wall at positions overlapping the second coil end in the radial direction of the rotary shaft,
• wherein the plurality of first oil supply holes are formed in the peripheral wall in a state where openings of the first oil supply holes on a side of the first coil end are arranged side by side in a circumferential direction of the rotary shaft, and
• wherein the plurality of second oil supply holes are formed in the peripheral wall in a state where openings of the second oil supply holes on a side of the second coil end are arranged side by side in the circumferential direction of the rotary shaft.