Petrophila confusalis, the confusing petrophila moth, is a moth in the Crambidae family. It was described by Walker in 1866. It is found in North America, where it has been recorded from British Columbia, California, Maryland, Minnesota, Montana, Nevada, Oregon, Texas, Washington and Wyoming. The length of the forewing is 5–11 mm. Adults are on wing from April to September. The larvae feed on algea on rocks.