Extensive field surveys and investigations have been made in Sylhet, Cox’s Bazar, Chittagong, and Chittagong Hill Tracts of Bangladesh to explore the orchid diversity which resulted in good collections of orchids including some new reports. The orchid specimens were critically examined and identified. Amongst them, four species, i.e. Chiloschista parishii Seidenf., Coelogyne ovalis Lindl., Conchidium extinctorium (Lindl.) Y.P.Ng & P.J.Cribb, and Dendrobium parcum Rchb.f., are being reported here as new angiospermic records for Bangladesh flora. Two genera i.e. Chiloschista and Conchidium are reported for the first time from Bangladesh. Detailed description flowering time, ecology, and geographical distribution of the species have been provided with illustration and photographs.