Arpachshad (Biblical Hebrew: אַרְפַּכְשַׁד, romanized: ʾArpaḵšaḏ, in pausa אַרְפַּכְשָׁד ʾArpaḵšāḏ; Koine Greek: Ἀρφαξάδ, romanized: Arphaksád), alternatively spelled Arphaxad or Arphacsad, was one of the five sons of Shem, the son of Noah in the Hebrew Bible mentioned in the Generations of Noah in the Book of Genesis (Genesis 10:22, 24 and 11:10-13) and in 1 Chronicles 1:17-18. His brothers were Elam, Asshur, Lud and Aram; he is an ancestor of Abraham. He is said in Genesis 11:10 to have been born two years after the Flood, when Shem was 100.
His name appears in later books, including the New Testament's Gospel of Luke.