In India, majority of pig farmers are from backward section of population and follow traditional small-scale subsistence production system for their livelihood and food security. Pig farming may be a sustainable income generation way of the farmers in terai region of West Bengal due to availability of market. It was found from the survey that farmers of this region were perceived different constraints on pig farming. The major constraints were shortage of improved breed, lack of marketing network, credit linkage, knowledge and skill. Based on the above situation Krishi Vigyan Kendra, Cooch Behar conducted trainings and experimental programme on scientific pig farming from 2017 to 2019 in terai region of West Bengal. A case study was conducted to know impact of the experimental programme under different socio economic conditions. It was found from the study that annual income, house type, assets, employment generation & credit orientation of the farmers were increased after adoption of scientific pig farming technology. It was found from the study that net income of the farmers was more in case of Large White Yorkshire farming (Rs. 63000-75000) followed by Ghungroo pig farming (Rs. 40000-43000).