The impact of modem rice technologies on growth in area, production and productivity of rice in Bihar has been studied. An assessment has been made about the change in the cost of production and profitability in rice production due to adoption of modem rice technologies. The study has covered three periods viz. 1981-82 to 1990-91, 1991-92 to 2000-01 and 1981-82 to 2000-01. The overall annual compound growth rate in area, production and productivity of rice have been found as 0.02, 2.89 and 2.87 per cent, respectively during the period 1980-81 to 2000-01. This shows that area under rice has remained almost stagnant but production and productivity have received an impetus in their growth. The study has revealed that adoption of modem technologies had a positive Impact on rice productivity and income to the farming households in Bihar.