A foldable hanger may include a body equipped with a hanging element with a firm arm and a movable arm pivotably attached to the body, wherein said body further contains a spike and arresting pin slidable along the spike and exerting a force on the arresting pin, wherein the arresting pin has a shank with a relief snapping to an arresting groove of a sliding-block guide which moves between open and closed positions and contains a guiding slot for a shank of the arresting pin and allowing free movement of a relief of the arresting pin; an arresting groove at the closed end of the guiding slot accommodating the relief; a flexible element exerting a force on the sliding-block guide; sliding-block guide cogs coordinating with cogs at the proximal end of the movable arm; wherein the sliding-block guide is adapted for movement between a closed position and an open position.