Abstract: A safety box is adapted for use at any suitable location; however, it is designed especially for use in an automotive vehicle, and more specifically in a rented auto. An anchor member (perhaps a massive nylon block) is bolted to the floor of the vehicle or to another suitable stationary structure. The bottom of the box has a cavity which slips over and captures the anchor member, thus securing the box to the automotive vehicle floor or the like. A sliding door panel is located on the top of the box. In the back of the box, a sliding latch bar is completely enclosed within a vertical bore through the box wall. A spring biases the latch bar to a raised position where its lower end is outside the cavity. A closing of the lid pushes the latch bar downwardly and into the cavity, which traps the anchor member within the cavity to prevent a theft of the box. The closed lid, and therefore the trapped anchor member, is locked with a single key.