A receiving device in which detecting devices of various sizes can be stably accommodated in a receiving unit and an X-ray imaging apparatus having the same may be provided. There is provided a receiving device having a receiving unit in which a first detecting device is accommodated, the receiving device including: a fixing unit provided in the receiving unit and into which a part of a side surface of the first detecting device is inserted in order to prevent the first detecting device from being moved； and a detector support having a side that is connected to a rotating shaft and tiltable and configured to support at least one side surface of a second detecting device having a smaller size than the first detecting device.
