Orchidaceae is one of the families of plant kingdom that requires substantial conservation. Several epiphytic orchids have been found in tea gardens of foot-hills of Himalayan region in West Bengal, India. During the present field study in randomly selected 14 tea gardens of Terai region of West Bengal (New Chamta, Sannayasithan, Singhia Jhora, Kiran Chandra, Naxalbari, Vijoy Nagar, Atal, Hansqua, Gangaram, Dagapur, Sukna, Kamalpur, Gulma, and Mohorgaon), 12 species in 9 genera were recorded. Oraon and Kharia tribal communities are very popular in this region and utilize all these epiphytic orchids as medicine. Different plant parts such as root (6 species), leaf (7 species), pseudobulb/or stem (2 species), flower (3 species), and whole plant (2 species) are used for medicinal purpose. Fidelity level which expressed relative healing potential of medicinal plants was also calculated. Cent per cent fidelity value has been recorded in Bulbophyllum crassipes. According to IUCN Red List of threatened species (Version 2019-3), Dendrobium aphyllum is Least Concern (LC) species. Most of the epiphytic orchid species are facing threats in the tea garden region of Terai due to deforestation of old shade trees and lopping. Host-less epiphytic orchids should be transplanted on proper phorophytes (shade tree) in the tea garden. There is an urgent need to create awareness amongst people of the region about these orchids growing in tea garden of Terai region of West Bengal, India so as to preserve biodiversity and maintain a balance in the ecosystem.