The object of the present invention is to provide a device for extending and retracting an air conditioning hose for aircraft capable of being mounted to the access bridge of the aircraft for its subsequent connection to the air conditioning intake of that aircraft by way of a motor actuating a cable inside the air conditioning hose and circular elastic elements attached to the cable, which, when butting against disks of smaller diameter fastened to the hose, enable the correct extension or retraction of that hose, preventing it from bending or tangling, as well as including rigid elements providing a passage means for the cable guiding it through a telescopic tube provided on the device so as to mount the device to the access bridge of the aircraft.