Abstract: A device for storing and extending a hose for supplying conditioned air to an aircraft on the ground or to any other interior space, includes: a tubular housing (11) extending along a longitudinal axis (Z) and having a free open first end, which tubular housing (11) can store a hose; a hose (1) in fluid communication with a conditioned air unit and having a free downstream end; a drive system (4) that can be used to control the extension and retraction of the hose (1) between a retracted position in which the downstream end of the hose (1) is located in the tubular housing (11), and an extended configuration in which the downstream end of the hose (1) is outside the tubular housing (11) and at a distance from the first end of the tubular housing (11). The drive system (4) has N=4 to 8 drive bearings (6.1-6.6) disposed perpendicularly to the longitudinal axis (Z) and connected to one another by N swivel joints (7.1-7.7), thereby forming a closed chain.