An ankle support according to the present invention prevents the sweating of an ankle through smooth air permeation. The ankle support comprises an ankle brace, at least one protrusion, an anti-slipping band, a foot top pressing Velcro material, a compression band, and an ankle pressing Velcro material. The ankle brace includes: an entrance portion, which has a sack shape and an opened upper end and into which a foot is inserted a middle support portion, which is extended downward from the entrance portion to wrap and support an ankle and an ankle bone a foot sole support portion, which is extended from the middle support portion toward one side direction to wrap a foot sole and a plurality of foot top support portions, which are in the shape of bands and extended from the foot sole support portion toward both side directions to cover the foot top, and of which the length in one direction is longer than the length in the other direction, wherein the foot sole support portion and the foot top support portions are formed by stacking a plurality of layers including an inner fabric and an outer fabric, the inner fabric being formed of an air-permeable fabric, the outer fabric being formed of a Velcro material. The at least one protrusion is formed by the inner fabric protruding at a predetermined height. The anti-slipping band is configured of a plurality of bands at predetermined intervals on the terminal end of a shorter foot top support portion among the plurality of foot top support portions. The anti-slipping band is formed of at least one material of natural rubbers, synthetic rubbers, and silicone, and a surface of the anti-slipping band has a frictional force of a predetermined value or more. The foot top pressing Velcro material is formed on the terminal end of a longer foot top support portion among the plurality of foot top support portions, and detachably attached to the outer fabric. The compression band has predetermined length and width, and the middle po
