A device for carrying an object, comprising first and second shoulder straps, first and second chest straps to be fitted around the lower chest of a person, and a back portion connecting a first end of the shoulder straps with a first end of the chest straps. Second ends of the shoulder straps are connected to the chest straps, and second ends of the chest straps are detachably connectable to each other by means of a buckle. Lengths of the chest straps are adjustable. Each of the chest straps comprises at least an elastic section, said elastic section being elastically extendable in a longitudinal direction of the chest straps. Disclosed is also a backpack comprising such a device.