Pedubastis I or Pedubast I (c. 829 BC–804 BC) was a Pharaoh of Ancient Egypt. Pedubast is recorded as being of Libyan
ancestry and ruled Egypt for 25 years according to Manetho. He first became king at Thebes in Year 8 of Shoshenq III and
his highest dated Year is his 23rd Year according to Nile Level Text No. 29. This year is equivalent to Year 31 of
Shoshenq III. He was the main opponent to Takelot II and later, Osorkon B, of the Twenty-Third Dynasty Libyan kings of
Upper Egypt at Thebes. His accession to power plunged Thebes into a protracted civil war which lasted for three decades
between these two competing factions. Each faction had a rival line of High Priests of Amun with Pedubast's being
Harsiese B who is attested in office as early as Year 6 of Shoshenq III and then Takelot E who appears in office from
Year 23 of Pedubast I. Osorkon B was Pedubast I and Harsiese's chief rival. This conflict is obliquely mentioned in the
famous Chronicle of Prince Osorkon at Karnak.
Recent excavations by the University of Columbia in 2005 reveal that Pedubast's authority was recognised both at Thebes
and the western desert oases of Egypt-at the Great Temple of Dakhla where his cartouche has been found. He was succeeded
in power by Shoshenq VI.