India is facing the problem of food insecurity since independence. The Government has taken several measures to overcome this, still there was no maximum change that has taken place in the status of country’s food security. For the growing population the country has to produce more and more year after year. To make this possible the government announced National Food Security Mission Scheme to enhance the productivity of crops and income of the farmers through various crop based interventions. The present study on constraints faced by beneficiary farmers of NFSM in adopting NFSM interventions was undertaken in Belagavi and Haveri districts of Karnataka State with sample size of 180 beneficiaries from different components of NFSM viz., NFSM – Rice, NFSM – Pulse and NFSM – Coarse Cereals. Expost - facto research design of social research was used in the present investigation. The major constraints faced by the beneficiary farmers in adopting NFSM interventions among the beneficiary farmers of Belagavi district were, lesser amount of subsidy (in Rs), limited number of demonstrations and subsidy paid after purchase while an initial payment remains the highest problem. Whereas in case of Haveri district, the major constraints encountered by beneficiary farmers were, poor quality materials/machinery are supplied, non availability of particular seed varieties or hybrids and redtapism.