An image communication system includes an image transmission apparatus and an image reception apparatus. The image transmission apparatus includes a transmission-side wireless communication unit configured to transmit image data by radio waves. The image reception apparatus includes a reception-side wireless communication unit configured to receive the image data transmitted by the transmission-side wireless communication unit by radio waves. At least one of the image transmission apparatus and the image reception apparatus includes a radar detection unit configured to execute a detection process on radio waves of radar in a communication channel that has a possibility of being used for image data communication by the transmission-side wireless communication unit and the reception-side wireless communication unit.