He was received at the Libing army helipad by Governor Srinivas Patil and Chief Minister Pawan Chamling, his Cabinet colleagues and top state officials.
Modi also inspected a Guard of Honour by the Black Cat division of the Indian army and personnel of Sikkim police.
The PM's entourage then proceeded to Chintan Bhawan where he will officially inaugurate the National conference on Sustainable Agriculture & Farmers Welfare.
Carrying flowers and waving the tricolour, people lined the road leading to the venue of the conference.
