1. An image inspection device useable in an image output apparatus which records an image on an image recording medium on the basis of image data and outputs the image recording medium to an output tray, the device comprising: an image capturing section for capturing the image recording medium on the output tray; a controlling section which controls capturing by the image capturing section so as to acquire captured image data, which is acquired by capturing the image recording medium on which the image is recorded on the basis of the image data; an image-processing section which applies image processing to at least one of the image data and the captured image data for setting image characteristics of the image data and the captured image data to be substantially the same as one another; and a detecting section which detects abnormalities of the image recorded on the image recording medium, on the basis of the image data and the captured image data whose image characteristics are substantially the same as one another by the image processing of the image-processing section.