A motor module comprising: a motor having a rotating unit configured to rotate around a rotating axis (9, 9B); a fan which is disposed on one side of the motor in an axial direction and configured to rotate together with the rotating unit; and a casing (20, 20A) which accommodates the motor and the fan therein, wherein the casing (20, 20A) includes a tubular main body portion that extends in the axial direction, an intake port disposed on one side of the fan in the axial direction, an exhaust port disposed on the other side of the fan in the axial direction and on an outer side of the motor in a radial direction, a motor disposing unit (44, 44A, 44B) in which the motor is disposed, a flow passage which is a space that connects the intake port and the exhaust port to each other on an inside of the main body portion, and one or a plurality of partition units which are disposed on an inside of the flow passage and partition the flow passage, wherein the flow passage includes a fan accommodating unit (41, 41A) in which the fan is accommodated and which directly communicates with the intake port, wherein the partition unit includes a first central partition unit (541, 541A) that partitions the fan accommodating unit (41, 41A) and the motor disposing unit (44, 44A, 44B), wherein the first central partition unit (541, 541A) includes a cutout portion (540, 540A, 540B) provided at at least a part of the first central partition unit (541, 541A), and wherein the motor disposing unit (44, 44A, 44B) communicates with the fan accommodating unit (41, 41A) via the cutout portion (540, 540A, 540B), characterized in that the cutout portion (540, 540A, 540B) is positioned on an outer side in the radial direction of the rotating axis (9, 9B). a motor having a rotating unit configured to rotate around a rotating axis (9, 9B); a fan which is disposed on one side of the motor in an axial direction and configured to rotate together with the rotating unit; and a casing (20, 20A) which accommodates the motor and the fan therein, wherein the casing (20, 20A) includes a tubular main body portion that extends in the axial direction, an intake port disposed on one side of the fan in the axial direction, an exhaust port disposed on the other side of the fan in the axial direction and on an outer side of the motor in a radial direction, a motor disposing unit (44, 44A, 44B) in which the motor is disposed, a flow passage which is a space that connects the intake port and the exhaust port to each other on an inside of the main body portion, and one or a plurality of partition units which are disposed on an inside of the flow passage and partition the flow passage, a tubular main body portion that extends in the axial direction, an intake port disposed on one side of the fan in the axial direction, an exhaust port disposed on the other side of the fan in the axial direction and on an outer side of the motor in a radial direction, a motor disposing unit (44, 44A, 44B) in which the motor is disposed, a flow passage which is a space that connects the intake port and the exhaust port to each other on an inside of the main body portion, and one or a plurality of partition units which are disposed on an inside of the flow passage and partition the flow passage, wherein the flow passage includes a fan accommodating unit (41, 41A) in which the fan is accommodated and which directly communicates with the intake port, wherein the partition unit includes a first central partition unit (541, 541A) that partitions the fan accommodating unit (41, 41A) and the motor disposing unit (44, 44A, 44B), wherein the first central partition unit (541, 541A) includes a cutout portion (540, 540A, 540B) provided at at least a part of the first central partition unit (541, 541A), and wherein the motor disposing unit (44, 44A, 44B) communicates with the fan accommodating unit (41, 41A) via the cutout portion (540, 540A, 540B), characterized in that the cutout portion (540, 540A, 540B) is positioned on an outer side in the radial direction of the rotating axis (9, 9B).