广口螺（学名：Stomatella planulata），是原始腹足目广口螺科Stomatella的一种。主要分布于韩国、**，常栖息在潮间带岩礁上。

Stomatella planulata, common name the flattened stomatella, is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.