To provide a steering device that has a reduced distance between a rack shaft and an output shaft of a motor.

This steering device includes the motor 30 for rotating a belt 42, a nut 43 for transmitting rotational power of the motor 30 via the belt 42, the rack shaft 20 driven in the axial direction by rotation of this nut 43, and a rack housing for storing this rack shaft 20. A part being an outer peripheral surface of the nut 43 and opposed to the output shaft 31 of the motor 30 is formed as an opposed surface MA, a part being an outer peripheral surface of the nut 43 and except for the opposed surface MA is formed as an unopposed surface MB, a receiving part 44A for hooking the belt 42 is arranged on the opposed surface MA, and a bearing 48 is arranged on the unopposed surface MB.