The article attempts to analyze the reason and impact of Indian migration in the Terai of Nepal. It mainly focuses on a historical approach to understand past economic development and the present socio-economic conditions of the Nepal Terai, with special reference to the Indian migration in the area. The article looks at Indian migration in the Terai during different spans of time: after the unification, during the Rana period, during revolution of 1950, and after 1950. The study reveals that Indians were originally invited to settle down in the Nepal Terai. Later, after 1964, it was felt that the Terai was becoming over populated, and the population flow into the region needed to be curtailed not only from hills of Nepal but also from the Indian nationals whose number in Nepal continued to increase. (Rajeev Ranjan Singh 2007-01-27)