A new species of Belobranchus, a freshwater Eleotridae, is described from streams of Indonesia. It differs from the other only species belonging to the genus by a combination of characters including the scales in transverse forward series (22-28 versus 27-35), in transverse back series (18-21 versus 20-23), in predorsal scales (16-23 versus 21-34), and the in vivo general colour pattern. Particularly the caudal fin is never spotted but generally translucent with some yellow or reddish zones.