The objective of these experiments was to estimate the effect of rearing system (conventional and organic free-range system with the pasture) on fattening performance, carcass traits and meat and fat characteristics in two genotype of fattening pigs (commercial crossbreeds and Prestice Black-Pied pigs (PC) ). In conventional test PC was presented by lower daily weight gain and worse feed conversion, in organic test by lower or similar daily weight gain and similar or better feed conversion ratio. The PC showed lower carcass leanest and higher fatness in comparison with crossbreeds, whereas the higher differences have been shown in conventional test. Outdoor (free range system) pigs were presented by higher intramuscular fat, which is positively related with eating quality, than indoor pigs. The fatty acid composition in outdoor pigs was characterized by lower PUFA n6:n3 ratio in both, intramuscular and subcutaneous fat and by higher content PUFA n3 in subcutaneous fat at comparison with indoor (conventional) pigs. These improving characteristics could create the added value of product from alternative free range system, which seems to be more suitable for the autochthonous such as breed Prestice Black-Pied pigs.