Nemacheilus marang, new species, is described from Sungai Marang, Bengalon drainage, in the Sangkulirang peninsula karst formation, Borneo, Indonesia. It is distinguished from all other species of Nemacheilus of Borneo among others by its unique colour pattern made of 10–18 dark brown bars on the flank, extending from the dorsal midline to just below the lateral line, continuous across back, not or only slightly wider on back and where crossing the midlateral stripe; and having the bars usually regular, straight, and of width less than half that of the interspaces.