A wireless image transmission device includes an image processing main body; an image display unit electrically connected to the image processing main body; a first switching unit electrically connected to between the image processing main body and the image display unit; an image shooting control unit electrically connected to the first switching unit; and a wireless transmission unit electrically connected to the image shooting control unit. With these arrangements, images to be wirelessly transmitted from the wireless image device need not be converted in file type, so that the wireless image transmission device can have high transmission efficiency and simplified overall configuration to overcome the drawback of complicated configuration in the prior art wireless image transmission device.