Abstract: A security device. The device has a wedge to contact a door to prevent opening the door. An anchor is attached adjacent the door. A slot in the anchor is of predetermined length and width. A catch on the wedge has a limb extending from the wedge with a hook on the limb, remote from the wedge. The hook has a length and width less than the length and width of the slot in the anchor. To prevent opening of the door, the hook is engaged in the slot. Release of the wedge to enable opening of the door is achieved by moving the wedge so the hook portion lies along the slot and can be removed through the slot.