An ankle stirrup has a base, an ankle holder, a holder extender, and four combination structures. The ankle holder is pivotally combined with the base. The holder extender is pivotally combined with the ankle holder and located over the ankle holder. The four combination structures are disposed on the base, the ankle holder, and the holder extender to combine with the base, the ankle holder, and the holder extender. The ankle stirrup can achieve a fixing effect for an ankle of a user.
