An image recording apparatus includes: a camera unit that includes an image capturing lens, an image sensor, and a plurality of antenna modules each of which has a communication antenna; and a main unit that rotatably supports the camera unit so that an image capturing direction of the camera unit is (i) directed toward an outside of a vehicle and (ii) rotatable in an up-down direction. The main unit is configured to be installed on a window glass of the vehicle inside a cabin of the vehicle.