Odostomia chilensis is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.

The remaining three whorls of the teleoconch are well rounded, slightly constricted at the suture and moderately shouldered at the summit.

They are marked by four pitted spiral grooves, three of which divide the posterior two-thirds between the sutures into three almost equal areas, while the fourth is at the periphery.

These grooves as well as those on the base are crossed by many slender axial riblets which break them up into pits.

The raised spaces between the grooves are marked by slender lines of growth and many extremely fine spiral striations.