| Javaés River | |
| Name Other: | ♂ Bero Biòwa, ♀ Bèraku Bikòwa (Javaé), Braço Menor do Rio Araguaia |
| Pushpin Map: | Brazil |
| Pushpin Map Caption: | Location in Brazil |
| River System: | Araguaia River |
| Source1 Location: | Tocantins state |
| Mouth Coordinates: | -9.8417°N -50.2051°W |
| Subdivision Type1: | Country |
| Subdivision Name1: | Brazil |
The Javaés River (Portuguese: Rio Javaés or Braço Menor do Rio Araguaia, Javaé: ♂ Bero Biòwa [beˈɾo bɪɔˈwa], ♀ Bèraku Bikòwa [bɛɾaˈku bɪkɔˈwa])[1] is a river of Tocantins state in central Brazil. It is a tributary of the Araguaia River. Between the two rivers there is an island called Bananal, the biggest fluvial island in the world.
The Javaés River separates the Cantão State Park to the north from the Araguaia National Park to the south.