The aim of this study was to investigate the possibility of substituting animal fat (pork jowl) with cold pressed rapeseed oil (in quantities of 0, 15, 25, 35 and 50%) in model comminuted sausages in order to improve their ratio of omega-6 to omega-3 fatty acids without compromising the quality of the finished product. In the model sausages the following parameters were determined: the profile of fatty acids, TBA index, absolute difference in colour, ΔE, and sensory assessment was made immediately after preparation and after 21 days of storage under refrigeration. In addition, basic chemical composition was determined, the amount of storage leakage, and the performance of thermal treatment was calculated. Substitution of pork fat with rapeseed oil caused improvement of oxidation stability and omega-6 to omega-3 ratio in model comminuted sausages immediately after preparation and after 21 days of storage. The resulting scores for selected sensory quality factors were lower for the sausage in which pork fat was replaced with rapeseed oil. Performance of thermal treatment decreased, while the amount of leakage increased with increasing amount of the replaced animal fat. The maximum amount of substitution of animal fat with rapeseed oil in comminuted sausages should not exceed ¼  of the amount of added fat (with the addition of  20% by weight of the batter). This ensures that the products do not show significant deterioration in the technological and sensory quality.