[Object] To provide a slide tray having excellent practicality, convenience, and the like.[Solving Means] A slide tray includes a slide tray body having a first surface on which one or more slides can be mounted, and one or more first convex portions that protrude from the first surface of the slide tray body and set an area in which paper sheets can be mounted on the first surface while being held from one side in a first axis direction of two axis directions orthogonal to each other on the first surface.