The objective of this study was to assess the effect of different pastures, applied during the finishing period, on backfat fatty acid composition from organic pigs. Sixty Cinta Senese pigs were slaughtered from May 2010 to July 2011, during their finishing period they grazed on different types of pasture: 1) mixed grass (Vicia sativa L., Trifolium alexandrinum L. Avena sativa L.) and sorghum (Sorghum vulgare), 2) gleaning of barley (Hordeum vulgare L.) and horse bean (Vicia faba minor L.), 3) old alfalfa field (Medicago sativa L.) and 4) mixed grass (Avena sativa L., Hordeum vulgare L. Vicia faba minor L.) and sorghum. Animals were fed with 2.5 % D.M. live weight of farm feed, but during the period of access to pasture the diet was decreased and the availability of crops was ad libitum. The different availability of fatty acids coming from pastures brought a change regarding fatty acids composition of the pig backfat, in particular green pastures enrich fat deposits in n-3 linolenic acid.