The deciduous teeth storage device contains an openable casing, an upper gum cast, a lower gum cast, and a number of artificial teeth. The gum casts are stored in the casing. Along a gum model of the upper and lower gum casts, there are a number of holes for receiving the artificial teeth and the deciduous teeth, and the upper and lower gum casts are joined along their back edges by a foldable element providing an angle of rotation in-between. The casing contains a lower chamber where a movable drawer is configured for storing adhesives and artificial teeth. A transparent plate is attached to an upper side of the casing, and at least a pair of magnets are correspondingly embedded in the transparent plate and the top side of the casing, respectively, so that a childs photo can be positioned between the casing and the transparent plate.