A printing machine includes a movable lens, which may be placed in position at the time of printing and held at a stand-by position spaced apart from a film during other operations. In this way, maintenance and adjustment of the lens become easy. A sample print monitor comprising a CCD camera, a line sensor, etc., is provided for measuring deviation of the center of exposure to automatically register correction values. A desired exposure angle is obtained by rotating a negative mask portion, a lens portion, an exposure table, etc., at the same angle. In addition to a rotary mechanism, the lens portion is slid finely so as to constitute a printing machine of a three-dimensional photograph having higher accuracy. Moving means are provided to an enlarging lens and to the exposure table so as to effect printing by trimming. An edge shaver is caused to act in a rectangular direction to the travelling direction of printing paper so as to cut off dust within the range of the end surface of the tip of printing paper cut by a cutter, and the dust is sucked by a dust suction mechanism and is sent to a dust box.