Filing Date: 2004-05-05.-- Priority Data: ES (2003-05-06) (P200-30-10)The object of the invention is a procedure which permits delayed onset of ripening of bananas, while at the same time retaining suitable organoleptic and quality characteristics. The procedure is carried out in a non-controlled modified atmosphere, at a temperature between 12°C and 22°C, at atmospheric pressure, in which pure nitrous oxide is introduced and mixed with ventilation air until a nitrous oxide concentration of 40 to 60% is obtained, and an oxygen concentration between 12% and 8%, respectively, depending on the concentration of nitrous oxide.