A radiation emitting device (1) includes a radiation source unit (40) that irradiates a subject H with radiation, a camera (44) that captures an image of the subject (H) to acquire a captured image of the subject (H), and a monitor (25) that displays the captured image. A control device (23) controls at least one of the inclination or the rotation angle of the monitor (25) on the basis of at least one of the direction of the radiation source unit (40), the inclination of a radiation detector, and the rotation angle of the radiation detector, or the display content of the monitor (25).