An integrated-inverter electric compressor comprising: a cylindrical housing having an outer peripheral surface, a front end and a rear end, wherein the cylindrical housing contains an electric motor and a compression mechanism, and an inverter accommodating section that accommodates an inverter device including high-voltage components, wherein one of the high-voltage components is a common mode coil; a terminal block connected with a high-voltage cable (28, 29); and a bus bar assembly including a plurality of bus bars for electrical wiring between these electrical components, wherein the inverter accommodating section is provided at the outer peripheral surface of the cylindrical housing forming a part that serves as an inverter-board installation site, wherein the inverter accommodating section is further provided with an outward extending portion characterized in that the part of the inverter accommodating section serving as an inverter-board installation site has a depth and the outward extending portion extends outward from one end of the cylindrical housing, wherein the outward extending portion has a greater depth relative to that of the inverter-board installation site and serves as a high-voltage-component installation site that is integrally formed with the outward extending portion, and wherein one side of the high-voltage-component installation site comprises a terminal-block installation site for the terminal block and below the terminal-block installation site a coil installation site for the common mode coil, which have a depth greater than that of the remaining high-voltage-component installation site. a cylindrical housing having an outer peripheral surface, a front end and a rear end, wherein the cylindrical housing contains an electric motor and a compression mechanism, and an inverter accommodating section that accommodates an inverter device including high-voltage components, wherein one of the high-voltage components is a common mode coil; a terminal block connected with a high-voltage cable (28, 29); and a bus bar assembly including a plurality of bus bars for electrical wiring between these electrical components, wherein the inverter accommodating section is provided at the outer peripheral surface of the cylindrical housing forming a part that serves as an inverter-board installation site, wherein the inverter accommodating section is further provided with an outward extending portion characterized in that the part of the inverter accommodating section serving as an inverter-board installation site has a depth and the outward extending portion extends outward from one end of the cylindrical housing, wherein the outward extending portion has a greater depth relative to that of the inverter-board installation site and serves as a high-voltage-component installation site that is integrally formed with the outward extending portion, and wherein one side of the high-voltage-component installation site comprises a terminal-block installation site for the terminal block and below the terminal-block installation site a coil installation site for the common mode coil, which have a depth greater than that of the remaining high-voltage-component installation site.