Psilorhynchus bichomensis, a new species, is described from the Bichom River in Arunachal Pradesh, northeast India. The new species is characterised by the following characters: body elongate with 46 scales along lateral line, unbranched pectoral-fin rays 9–10, predorsal scales 13–14, circumpeduncular scales 8 and caudal fin peppered with transverse black bar on the lower lobe. The new species is compared with other congeners of the Psilorhynchus homaloptera species group.