An image transmission device is an image transmission device in an imaging display system in which an imaging device which images a subject and outputs frame image data, the image transmission device which wirelessly transmits the frame image data, an image reception device which wirelessly receives the wirelessly transmitted frame image data, and a display device which displays an image thereon based on the frame image data wirelessly received by the image reception device are included. The image transmission device includes an input unit, an image processing unit, a communication unit, and an adjustment unit.
