侧耳科（Pleurotaceae）是担子菌门下伞菌目的一科中小型的蘑菇，其中最常见的是食用平菇。

The Pleurotaceae are a family of small to medium-sized mushrooms which have white spores. The family contains four genera (Nematoctonus has been synonymized with Hohenbuehlia, but not all of its species have been moved to valid genera) and 94 species. Members of Pleurotaceae can be mistaken for members of Marasmiaceae. Perhaps the best known member is the oyster mushroom, Pleurotus ostreatus.