Austrolittorina unifasciata, common name the banded periwinkle, is a species of sea snail, a marine gastropod mollusk in the family Littorinidae, the winkles or periwinkles.

This common periwinkle also lives on the rocky shore of New Zealand.

This species of periwinkle lives in the splash zone and high intertidal zone, where it is found in clusters of individuals.

The banded periwinkle grazes on lichen and algae.

This small snail is eaten by crabs and birds.