A motor-integrated fluid machine that suctions a fluid from a suction port and discharges the suctioned fluid from a discharge outlet , the machine comprising: a shaft portion provided at a center of a rotation axis (I); a rotating portion that rotates around the shaft portion ; an outer peripheral portion provided on an outer periphery of the shaft portion ; and a motor that rotates the rotating portion , wherein the rotating portion is rotatably supported on the shaft portion , so that a shaft portion side is a fixed end side and an outer peripheral portion side is a free end side, the motor is an outer peripheral drive motor that applies power from the outer peripheral portion to rotate the rotating portion , the rotating portion includes a plurality of blades provided side by side in a circumferential direction of the rotation axis (I), wherein an end portion on the shaft portion side of the blade is a fixed end, and an end portion on the outer peripheral portion side of the blade is a free end, and a rotating support ring provided on the outer peripheral portion side of the plurality of blades , the motor includes a rotor side magnet provided in the rotating support ring , and a stator side magnet provided in the outer peripheral portion to face the rotor side permanent magnet , characterized in that in a cross section of a portion on the free end side cut along a plane orthogonal to the circumferential direction of the rotation axis (I), a center (P2) of gravity of the portion on the free end side is located on a suction port side in an axial direction of the rotation axis (I) with respect to a center (P1) of thrust applied to each blade of the plurality of blades , the portion on the free end side including the rotating support ring and the rotor side magnet . a shaft portion provided at a center of a rotation axis (I); a rotating portion that rotates around the shaft portion ; an outer peripheral portion provided on an outer periphery of the shaft portion ; and a motor that rotates the rotating portion , wherein the rotating portion is rotatably supported on the shaft portion , so that a shaft portion side is a fixed end side and an outer peripheral portion side is a free end side, the motor is an outer peripheral drive motor that applies power from the outer peripheral portion to rotate the rotating portion , the rotating portion includes a plurality of blades provided side by side in a circumferential direction of the rotation axis (I), wherein an end portion on the shaft portion side of the blade is a fixed end, and an end portion on the outer peripheral portion side of the blade is a free end, and a rotating support ring provided on the outer peripheral portion side of the plurality of blades , a plurality of blades provided side by side in a circumferential direction of the rotation axis (I), wherein an end portion on the shaft portion side of the blade is a fixed end, and an end portion on the outer peripheral portion side of the blade is a free end, and a rotating support ring provided on the outer peripheral portion side of the plurality of blades , the motor includes a rotor side magnet provided in the rotating support ring , and a stator side magnet provided in the outer peripheral portion to face the rotor side permanent magnet , a rotor side magnet provided in the rotating support ring , and a stator side magnet provided in the outer peripheral portion to face the rotor side permanent magnet , characterized in that in a cross section of a portion on the free end side cut along a plane orthogonal to the circumferential direction of the rotation axis (I), a center (P2) of gravity of the portion on the free end side is located on a suction port side in an axial direction of the rotation axis (I) with respect to a center (P1) of thrust applied to each blade of the plurality of blades , the portion on the free end side including the rotating support ring and the rotor side magnet . <EOS>