A plate holder for holding a license plate includes: a holder base having, on a first side, a contact surface, which extends along a contact plane and on which a license plate is rests in a position arranged on the plate holder; and two guide rails, which are arranged on the holder base and extend parallel to each other and between which the license plate can be slid in an insertion direction for arrangement on the contact surface, the license plate being held between the guide rails in the position arranged on the plate holder, wherein the holder base has, on a second side facing away from the contact surface, a placement surface, which extends parallel to the contact plane, is spaced apart from the contact surface in a vertical direction pointing perpendicularly to the contact plane, and can be placed on an object to arrange the plate holder.