Ardalus (Ancient Greek: Ἄρδαλος) was, in Greek mythology, a son of the god Hephaestus who was said to have invented the flute, and to have built a sanctuary of the Muses at Troezen, who derived from him the surname Ardalides or Ardaliotides.
This story is recorded in the works of Pausanias, and in some obscure fragments of Hesychius of Alexandria.
This article incorporates text from a publication now in the public domain: Schmitz, Leonhard (1870). "Ardalus". In Smith, William (ed.). Dictionary of Greek and Roman Biography and Mythology. Vol. 1. p. 274.