The Kār-Nāmag ī Ardašīr ī Pābagān ("Book of the Deeds of Ardeshir, Son of Papak") (Persian: کارنامهٔ اردشیر بابکان), is a short Middle Persian prose tale written in the Sassanid period (226-651). The story narrates the story of Ardashir I, the founder of the Sassanid dynasty. His own life story—his rise to the throne, battle against the Parthian king Ardawān (or Artabanus), and conquest of the empire by the scion of the House of Sāsān, as well as episodes concerning his heir Šābuhr and the latter’s son, Ohrmazd
When Ardashir was born he spent his childhood in the court of Artabanus IV of Parthia and then ran away with a servant of the King. After several wars with Artabanus, Ardashir I defeated and killed the king, and thus could found the new empire. Historians would later name the dynasty after Sassan, Ardashir I's grandfather. The Karnamag is permeated with Zoroastrian doctrine.
The sole independent manuscript of this text to have been identified so far is codex MK, which was copied in 1322 in Gujarat by Mihrābān ī Kay-Husraw, a gifted copyist belonging to a well known family of scribes. The book narrates the epic adventures of Ardashir I, the founder of the Sassanid Empire. The story relates how Ardashir's father Papak, dreamed that his father Sassan would be reborn as Ardashir. According to the story, Ardashir I was the natural son of Sassan. A rescension of the same story is found in the Shahnama. However, The contents of the text draw from more ancient Iranian lore, since some traits of Ardashir’s life as narrated in this work reflect themes known from the legend of Cyrus the Great.