A substrate magazine for a substrate insertion system, having a frame in which several drawers for receiving in each case at least one flat substrate are arranged one above the other. Each drawer is formed by two guide rails, arranged in parallel and at a distance from one another at the same height as that of the frame, each with a sliding surface on which a substrate lying on the edge can be displaced. At least one elastically displaceable latching element is assigned to each drawer. In a first, unloaded state, the at least one latching element extends at least partially over the sliding surface of one of the guide rails of the drawer and, in a second, elastically deformed state, releases the sliding surface.