A new species, Gastrochilus deltoglossus, is described and illustrated from Taiwan. This species is characterized by the presence of pendulous stems, leaves without awned apex, 3.5β4.0 mm tall subconical hypochile, and broadly deltoid, ciliate, adaxially sparsely short-hairy epichile that are approximately as wide as hypochile. Notes on its distribution, ecology, conservation status and taxonomic affinities are presented