In this study, the effects of chitosan coating enriched with different proportions of liquorice extract on the quality of trout fillets (Oncorhynchus mykiss) during refrigerated storage (4±1°C) were investigated. Chitosan and Chitosan + LE (0.4% and 0.8% w/w) solutions were used for the coating. Control and coated fish samples were analyzed periodically for their chemical (TVB-N, PV, TBA) and microbiological (total aerobic mesophile bacteria) properties. The data obtained showed that the Chitosan + LE coating is effective to prolong the shelf life of the trout fillets in the refrigerator depending on the ratio of licorice extract and to maintain good quality for longer periods. The combined effects of chitosan and liquorice extract were effective in keeping quality properties at an acceptable level for up to 15 days of storage, while control and chitosan-coated groups reached an unacceptable level on day 15.