An electric motor to be oppositely spaced from a plate electrically grounded in an axial direction extending along an axis of rotation, said electric motor comprising: a rotor configured to rotate about said axis of rotation; a stator located at a side adjacent to said axis of rotation with respect to said rotor and including teeth facing said rotor with an air gap therebetween and having conductivity, a back yoke coupling ends of said teeth at the side adjacent to said axis of rotation to each other and having a tubular shape and conductivity, and windings wound around said teeth; a shaft extending along said axis of rotation and passing through said back yoke to be fixed to one of said stator and said rotor; at least one bearing (41, 42) including an inner ring (411, 421) fixed to said shaft and having conductivity, and an outer ring (412, 422) fixed to said inner ring so as to rotate relative thereto and having conductivity; and a bearing housing extending so as not to be located in a first area at a side adjacent to said plate with respect to said stator in said axial direction and to be located in a second area opposite said plate in said axial direction, characterized by a stray capacitance C5 between the plate and the shaft having a value comparable to a value of a stray capacitance C6 between the bearing housing and the plate, said bearing housing being fixed to said outer ring of said at least one bearing and to the other of said stator and said rotor. a rotor configured to rotate about said axis of rotation; a stator located at a side adjacent to said axis of rotation with respect to said rotor and including teeth facing said rotor with an air gap therebetween and having conductivity, a back yoke coupling ends of said teeth at the side adjacent to said axis of rotation to each other and having a tubular shape and conductivity, and windings wound around said teeth; teeth facing said rotor with an air gap therebetween and having conductivity, a back yoke coupling ends of said teeth at the side adjacent to said axis of rotation to each other and having a tubular shape and conductivity, and windings wound around said teeth; a shaft extending along said axis of rotation and passing through said back yoke to be fixed to one of said stator and said rotor; at least one bearing (41, 42) including an inner ring (411, 421) fixed to said shaft and having conductivity, and an outer ring (412, 422) fixed to said inner ring so as to rotate relative thereto and having conductivity; and an inner ring (411, 421) fixed to said shaft and having conductivity, and an outer ring (412, 422) fixed to said inner ring so as to rotate relative thereto and having conductivity; and a bearing housing extending so as not to be located in a first area at a side adjacent to said plate with respect to said stator in said axial direction and to be located in a second area opposite said plate in said axial direction, characterized by a stray capacitance C5 between the plate and the shaft having a value comparable to a value of a stray capacitance C6 between the bearing housing and the plate, said bearing housing being fixed to said outer ring of said at least one bearing and to the other of said stator and said rotor.