A system for mounting a motor including a stator-side member (4, 6) and a rotor-side member, the system comprising: the motor; a motor attachment member for supporting the motor; an intermediate member (3, 7) arranged between the motor attachment member and the stator-side member (4, 6) for fixing the stator-side member (4, 6); a plurality of stator-side support members (40, 30, 41, 32, 42, 70, 45, 36, 60) for coupling the stator-side member (4, 6) and the intermediate member (3, 7); and a plurality of motor-attachment-member-side support members (20, 31, 29, 34, 33, 71, 21, 24, 37, 26b, 27b) for attaching the intermediate member (3, 7) to the motor attachment member, characterized in that, when a stator-side supporting line is defined as a line connecting a center of one of the plurality of stator-side support members (40, 30, 41, 32, 42, 70, 45, 36, 60) with a rotation center of the rotor-side member, and when a center line is defined as a line evenly dividing an included angle made by the stator-side supporting line and another stator-side supporting line adjacent to the stator-side supporting line, each of the motor-attachment-member-side support members (20, 31, 29, 34, 33, 71, 21, 24, 37, 26b, 27b) is arranged in the intermediate member (3, 7) within an angular region formed between the center line and the stator-side supporting line, wherein vibration of the stator-side member (4, 6) vibrating in ring zeroth-mode is transmitted to the intermediate member (3, 7) through the stator-side support members (40, 30, 41, 32, 42, 70, 45, 36, 60), a plurality of portions having a large amplitude of vibration and a plurality of portions having a small amplitude of vibration are formed in the intermediate member (3, 7) due to the transmission, and the motor-attachment-member-side support members (20, 31, 29, 34, 33, 71, 21, 24, 37, 26b, 27b) are arranged in the portions having the small amplitude of vibration. the motor; a motor attachment member for supporting the motor; an intermediate member (3, 7) arranged between the motor attachment member and the stator-side member (4, 6) for fixing the stator-side member (4, 6); a plurality of stator-side support members (40, 30, 41, 32, 42, 70, 45, 36, 60) for coupling the stator-side member (4, 6) and the intermediate member (3, 7); and a plurality of motor-attachment-member-side support members (20, 31, 29, 34, 33, 71, 21, 24, 37, 26b, 27b) for attaching the intermediate member (3, 7) to the motor attachment member, characterized in that, when a stator-side supporting line is defined as a line connecting a center of one of the plurality of stator-side support members (40, 30, 41, 32, 42, 70, 45, 36, 60) with a rotation center of the rotor-side member, and when a center line is defined as a line evenly dividing an included angle made by the stator-side supporting line and another stator-side supporting line adjacent to the stator-side supporting line, each of the motor-attachment-member-side support members (20, 31, 29, 34, 33, 71, 21, 24, 37, 26b, 27b) is arranged in the intermediate member (3, 7) within an angular region formed between the center line and the stator-side supporting line, wherein vibration of the stator-side member (4, 6) vibrating in ring zeroth-mode is transmitted to the intermediate member (3, 7) through the stator-side support members (40, 30, 41, 32, 42, 70, 45, 36, 60), a plurality of portions having a large amplitude of vibration and a plurality of portions having a small amplitude of vibration are formed in the intermediate member (3, 7) due to the transmission, and the motor-attachment-member-side support members (20, 31, 29, 34, 33, 71, 21, 24, 37, 26b, 27b) are arranged in the portions having the small amplitude of vibration.