An electric compressor (1, 101, 201) comprising: a compressor (3, 103, 203) configured to compress a refrigerant, the compressor (3, 103, 203) having a plurality of passage ports (7, 207) delivering the refrigerant; an electric motor (5, 105, 205) configured to drive the compressor (3, 103, 203), the electric motor (5, 105, 205) having a plurality of stators and an accommodation chamber (13, 213) accommodating the plurality of stators; a partition wall (15, 115, 215) separating the compressor (3, 103, 203) and the accommodation chamber (13, 213) of the electric motor (5, 105, 205); and a plurality of refrigerant introducing/discharging passages (19, 119, 219) formed at the partition wall (15, 115, 215) wherein the respective refrigerant introducing/discharging passages (19, 119, 219) are located in a circumferential direction of the accommodation chamber (13, 213), thereby the refrigerant being introduced into and discharged from stators end in the electric motor (5, 105, 205) through the respective refrigerant introducing/discharging passages (19, 119, 219), characterized in that a refrigerant circulation passage is formed between the passage ports of the compressor (3, 103) and the partition wall (15, 115), thereby introducing the refrigerant from the passage ports to the refrigerant circulation passage or introducing the refrigerant from the refrigerant circulation passage to the passage ports; the refrigerant introducing/discharging passages (19, 119) are made of a plurality of round holes (19, 119), respectively; and the number of the plurality of round holes (19, 119) is larger than the number of the passage ports. a compressor (3, 103, 203) configured to compress a refrigerant, the compressor (3, 103, 203) having a plurality of passage ports (7, 207) delivering the refrigerant; an electric motor (5, 105, 205) configured to drive the compressor (3, 103, 203), the electric motor (5, 105, 205) having a plurality of stators and an accommodation chamber (13, 213) accommodating the plurality of stators; a partition wall (15, 115, 215) separating the compressor (3, 103, 203) and the accommodation chamber (13, 213) of the electric motor (5, 105, 205); and a plurality of refrigerant introducing/discharging passages (19, 119, 219) formed at the partition wall (15, 115, 215) wherein the respective refrigerant introducing/discharging passages (19, 119, 219) are located in a circumferential direction of the accommodation chamber (13, 213), thereby the refrigerant being introduced into and discharged from stators end in the electric motor (5, 105, 205) through the respective refrigerant introducing/discharging passages (19, 119, 219), characterized in that a refrigerant circulation passage is formed between the passage ports of the compressor (3, 103) and the partition wall (15, 115), thereby introducing the refrigerant from the passage ports to the refrigerant circulation passage or introducing the refrigerant from the refrigerant circulation passage to the passage ports; the refrigerant introducing/discharging passages (19, 119) are made of a plurality of round holes (19, 119), respectively; and the number of the plurality of round holes (19, 119) is larger than the number of the passage ports.