The Amba (, in Udege Language it means Tiger) is a river in Primorsky Krai, Russia.
It rises in the Borisov Plateau near the border with China and flows into the Amur Bay of the Sea of Japan. The river is long, and its drainage basin covers . The river is wide and deep.
The water level of the Amba may rise as much as higher after summer rains.
Amba literally means Amur tiger in Nanai and Udege languages.