Apple is an important horticultural crop, that accounted for a large share of the country's exports each year. But the apples produced in Iran do not have a good quality and long shelf life due to unsuitable storage and packaging in terms of marketing. Nowadays, new technologies are demanded to extend the life of harvested fruits and vegetables. Using wax not only improves the appearance of the fruits, but also increases their quality and shelf life by reducing the spread of mold and moisture loss. The advantage of coating agents, is reducing trairation and respiration leading to maintain the quality and enhanced shelf life of the fruits. But improper use of these treatments will cause an undesirable flavors in the fruit due to exchange of oxygen and carbon dioxide and anaerobic respiration. Chitosan, the most important coating agent, is used during the post-harvest procces. Coating with chitosan plays a positive role in shelf life of fruits and vegetables, because chitosan coating revents mold growth and creat an active packaging and a good quality of the fruit for a longer time. In this research the effect of different levels of chitosan (0,0/5,1,2 %) associated with a commerical chitosan (Chitin Seal 901) on the shelf-life of apple cv “Golab kohanz” and apple cv “Soltani” was studied. After storage at 1 °C and 90% RH, Fruits were evaluted every one month for apple Soltani and 21 days in the case of Golab Kohanz, In terms of some traits such as firmness, weight loss, pH extract, soluble solids and titratable acid, vitamin C, total phenolics, flavor index, and antioxidant capacity and measured decay. The study was conducted as a split plot in time within a complete randomized design in 3 replications. Result of analysis of variance showed that effect of time, treatment and interaction of among them for most studied traits were significant. The results showed that apple cv “Golab Kohanz” fruit treated with chitosan, exhibited a longer cold storage period, firmness, vitamin C, soluble solids and titratable acid than those control. The pH of the extract and the percentage of weight loss was significantly less than the control. The highest firmnness (2/14 kg/cm 2 ) was recorded with 2 % and then (2/10 kg/cm 2 ) 1 % chitosan as there was no significant diffrence between them and the lowest firmness (1/91 kg/cm 2 ) was related to control. The highest percentage of weight loss (% 2/91) was recorded with control and the lowest (% 1/12) was related to 2% chitosan. 2% chitosan showed the highest percentage of phenolic compounds and antioxidant capacity. The highest percentage (4/56) of decay was observed with the control and the lowest (%0) was abserved with 1% and 2% chitosan. Results of Chitosan treatments on storage life of apple fruit Soltani showed that the fruits treated with chitosan after 210 days of storage at 1 ° C had ignificantly a higher firmness, titratable acid, soluble solids, vitamin C, total phenolics and antioxidant capacity when compared to the control. The pH of the extract, the weight loss percentage and the percentage of decay were significantly lower than the control. 2% chitosan in apple Soltani showed more positive effects than those of the rest. Result shows that the use of 2 % chitosan enhances the shelf life of apple cv Golab kohanz and apple cultivars Soltani and reduces the speed of biochemical changes in apple fruit and increase fruit quality. Key words : apple cv. soltani, apple cv. Golab Kohanz, chitosan, Postharvest life, Edible coating