A wireless image acquisition system includes an endoscope assembly (10) for transmitting acquired image information by radio waves, and an image receiving unit (20) for receiving and display the image information transmitted from the endoscope assembly (10). A monitor unit (204) of the image receiving unit (20) displays wireless communication setting information. An image acquisition unit (111) of the endoscope assembly (10) captures the wireless communication setting information. A control unit (123) of the endoscope assembly (10) makes wireless communication setting of the endoscope assembly (10) based on the captured wireless communication setting information, and detect that the distance from the image acquisition unit (111) to the monitor unit (204) is within a predetermined value when the wireless communication setting information is captured. A warning unit (129) of the endoscope assembly (10) gives a warning when the detected distance is within the predetermined value.
