An image recording apparatus, including: a recording device; discharge trays; a discharge mechanism; detectors; an input device through which is inputted authentication information relating to image data; and a controller including: an image-data reception portion; an authentication-information confirming portion to make a confirmation as to whether the authentication information contains specific information; a confirmation-necessity judging portion to judge whether the confirmation by the confirming portion with respect to the image data is necessary; a selecting portion to select one discharge tray on which the recording medium is not placed, wherein, where the judging portion judges that the confirmation is necessary, the controller permits selection of the one discharge tray, controls the recording device to record the image based on the image data after the confirmation that the authentication information contains the specific information, and controls the discharge mechanism to discharge, to the selected one discharge tray, the image-recorded recording medium.