Provided are: an illumination device having a configuration in which a temperature rise of a radiation member is suppressed in a limited volume to thereby maintain a temperature of an LED at a predetermined value or less and an image reading device provided with the illumination device. In preferred embodiments, a handle is attached to the slidable tray allowing the user to manually extend and retract the receptacle from the apparatus. The cutting blade holder can be made of a less expensive material, with only the cutting blade being made of higher-grade materials that maintains its cutting edge well.