Ashur-nadin-ahhe II (Aššur-nādin-ahhē II) was king of Assyria from 1403 to 1393 BC. Preceded by Ashur-rim-nisheshu, he is considered to be the last king of the Old Assyrian Period. He was succeeded by Eriba-Adad I, the first king of the Middle Assyrian period.
Ashur-nadin-ahhe is an Assyrian personal name meaning "the god Ashur has given a brother" in Akkadian language. Two Assyrian kings ruling in the 15th or early 14th century BC were called Ashur-nadin-ahhe. Hardly anything is known about these kings, but one of them is mentioned in one of the Amarna letters. In the letter from king Ashur-uballit of Assyria to the Pharaoh of Egypt, numbered EA 16, Ashur-nadin-ahhe is referred to as his ancestor who wrote to Egypt and received gold in return. This would imply an earlier diplomatic marriage and alliance between Assyria and Egypt during his reign. The name Ashur-nadin-ahhe mentioned in EA 16 has recently been contested as a faulty writing of Ashur-nadin-apli, another Assyrian king.