In Greek mythology, the Taraxippus, or "horse disturber", was a presence that was variously identified as a ghost or dangerous site, blamed for frightening horses athippodromes throughout Greece. Some taraxippoi were associated with hero cult or with Poseidon in his aspect as a god of horses who brought about the death of Hippolytus. Pausanias, the ancient source offering the greatest number of explanations, regards it as an epithet rather than a single entity.

The race-course has one side longer than the other, and on the longer side, which is a bank, there stands, at the passage through the bank, Taraxippos, the terror of the horses. It is in the shape of a round altar and there the horses are seized by a strong and sudden fear for no apparent reason, and from the fear comes a disturbance. The chariots generally crash and the charioteers are injured. Therefore the drivers offer sacrifices and pray to Taraxippos to be propitious to them.