The objective of the paper was a comparison between the quality of potato chips fried in two types of oil, packed in aluminum foil, and stored under the standard conditions (temperature 20°C, humidity 50%), and in a climatic chamber (temperature 45°C, humidity 80%). It was stated that chips fried in a hydrogenate palm oil contained more fat and showed a higher hardness than the chips fried in a liquid oil. During the storage, the chips’ moisture increased irrespectively of the type of chips. The moisture of chips stored in the climatic chamber increased twice as quick as the moisture of chips stored under the standard conditions. The fat extracted from chips fried in a liquid oil, prior to their storage, showed a lower acid value and a higher ‘Lea’ value if compared with the fat extracted from chips fried in a hydrogenated palm oil. Chips fried in a hydrogenated fat had also a higher oxidative stability. Irrespectively of the type of fat used (liquid or hydrogenated), there were determined no changes in the acid value of the fat extracted from chips stored under the standard conditions, however, it was found that the Lea value increased in the fat from chips stored in the climatic chamber. The chips stored under the standard conditions for a period of 36 weeks, and in the climatic chamber for 9 weeks had a similar flavor and smell. The differences in their consistency were caused by a higher content of moisture in chips stored in the climatic chamber than in those stored under the standard conditions. The testing results of chips stored in the climatic chamber (the so called short-term storage) allow for the determination of a scale and rate of deterioration processes in products stored under the standard  conditions. The oxidative stability of chips is increased in chips fried in a hydrogenated oil, but, on the other hand, such chips absorb more fat.