Ecphantus or Ecphantos (Ancient Greek: Ἔκφαντος) or Ephantus (Έφαντος) is a shadowy Greek pre-Socratic philosopher. He may not have actually existed. He is identified as a Pythagorean of the 4th century BCE, and as a supporter of the heliocentric theory. Described as from Syracuse, this may or may not be the same figure as the attested Ecphantus of Croton. Ecphantus, like Heraclides of Pontus, believed that the Earth turns around its centre from west to towards east, like a wheel, as if it has an axis, the state.