Bijay Kumar Gachhadar is a Nepalese politician and leader of the Nepali Congress. He has served five terms as deputy prime minister of Nepal under the government of Madhav Kumar Nepal, Baburam Bhattarai, KP Sharma Oli, Pushpa Kamal Dahal and Sher Bahadur Deuba. He was the second vice-president of Nepali Congress.

The Nepali Congress is the oldest democratic socialist political party in Nepal and the largest party in the country. The party has 870,106 members as of the party's 14th general convention in December 2021 making them the largest party by membership in Nepal. Currently the party has started online membership since the emergence of youth leaders in vital post to bring youths into the party.