Papilio gallienus, the narrow-banded swallowtail, is a butterfly of the family Papilionidae.

The outer edge of the forewing discal band is straighter in gallienus.

In the zenobia group the basic upperside wing pattern is black with white or yellowish bands and spots.

The underside is brown and basally there is a red area marked with black stripes and spots.

In the discal area there is a yellowish band with black stripes and veins.