A lifting device for lifting a shipping container off a flat bed of a truck is described. The device comprises a cross member and a pair of arms connected thereto. The upper ends of the arms engage in the connector castings at the upper end of an end of the container. The cross member carries near its ends a pair of guides through which a pair of legs are slidably mounted. The upper end of each leg has an outwardly directed lug. A block and tackle unit is connected between the lug and the cross member. There is a lifting device at each end of the container. When the unit is actuated the container is lifted off the flat bed so that the truck can move away and the container thereafter lowered on to the ground.