An electric scroll compressor, comprising: a housing member (5, 6, 7); a compression mechanism which is accommodated in the housing member (5, 6, 7), and in which a fixing scroll having a substrate and a spiral wall and a swing scroll having a substrate and a spiral wall mesh with each other to form a compression chamber; a drive shaft by which the swing scroll is revolved; a rotation preventing mechanism which prevents rotation of the swing scroll; and an electric motor which is accommodated in the housing member (5, 6, 7) and rotates the drive shaft, wherein in the housing member (5, 6, 7), a motor fixing portion to which the electric motor is fixed, and an end plate which supports an axial load of the swing scroll and rotatably supports the drive shaft are integrally formed, wherein the rotation preventing mechanism is configured, between the substrate of the swing scroll and the end plate, of a plurality of pins which are arranged circumferentially and a plurality of cylindrical recessed portions engaging with the pins, wherein the cylindrical recessed portions are formed on the substrate of the swing scroll, and wherein the pins are fixed to the end plate wherein a stator and a rotor configuring the electric motor are accommodated in the motor fixing portion which is formed on the front side of the end plate of the housing member (5,6,7) and characterised in that a plurality of holes are formed in the end plate on the outside in a radial direction from the portion to which each of the pins is fixed, the holes are disposed between the motor fixing portion of the housing member and the portions to which the pins are pressure-fitted so as to be fixed, wherein stator contact portions which come into contact with the stator and stator non-contact portions which do not come into contact with the stator are alternately formed on the inner circumferential surface of the housing member in the circumferential direction, and wherein the plurality of holes are formed in the circumferential direction at positions corresponding to the stator contact portions in the axial direction, that is, positions overlapping with the stator contact portions in the circumferential direction. a housing member (5, 6, 7); a compression mechanism which is accommodated in the housing member (5, 6, 7), and in which a fixing scroll having a substrate and a spiral wall and a swing scroll having a substrate and a spiral wall mesh with each other to form a compression chamber; a drive shaft by which the swing scroll is revolved; a rotation preventing mechanism which prevents rotation of the swing scroll; and an electric motor which is accommodated in the housing member (5, 6, 7) and rotates the drive shaft, wherein in the housing member (5, 6, 7), a motor fixing portion to which the electric motor is fixed, and an end plate which supports an axial load of the swing scroll and rotatably supports the drive shaft are integrally formed, wherein the rotation preventing mechanism is configured, between the substrate of the swing scroll and the end plate, of a plurality of pins which are arranged circumferentially and a plurality of cylindrical recessed portions engaging with the pins, wherein the cylindrical recessed portions are formed on the substrate of the swing scroll, and wherein the pins are fixed to the end plate wherein a stator and a rotor configuring the electric motor are accommodated in the motor fixing portion which is formed on the front side of the end plate of the housing member (5,6,7) and characterised in that a plurality of holes are formed in the end plate on the outside in a radial direction from the portion to which each of the pins is fixed, the holes are disposed between the motor fixing portion of the housing member and the portions to which the pins are pressure-fitted so as to be fixed, wherein stator contact portions which come into contact with the stator and stator non-contact portions which do not come into contact with the stator are alternately formed on the inner circumferential surface of the housing member in the circumferential direction, and wherein the plurality of holes are formed in the circumferential direction at positions corresponding to the stator contact portions in the axial direction, that is, positions overlapping with the stator contact portions in the circumferential direction.