The inferior labial artery (Latin: arteria labialis inferior) is a branch of the facial artery that arises near the edge of the lower lip. This artery supplies the skin and muscles of the lower lip.
The inferior labial artery passes anteriorly beneath the depressor anguli oris muscle penetrating the orbicularis oris. It runs along the margin of the lower lip between the orbicularis oris muscle and the mucous membrane. The artery forms anastomoses with the same artery of the contralateral side and with the mental branch of the inferior alveolar artery.