Abstract: The gas generating device according to the invention comprises a basin-like main container containing a solid chemical reagent substance, and an auxiliary container, arranged at the interior of the main container, containing a liquid chemical reagent substance.The main container is closed at its top by a cover lid in such a manner as to permit the outflow of gas generated at its interior. The gas generating device is accomodated at the interior of a storage or transport receptacle formed by a stack of superposed crates of fruits or vegetables, enclosed in a gas-tight wrapping of suitable plastic sheet material.