Papilio antimachus, the African giant swallowtail, is a butterfly in the family Papilionidae.

The wings are long and narrow and the ground colour is orange brown with black markings.

The distribution area (range) stretches from Angola, Cameroon, Democratic Republic of the Congo, Republic of the Congo, Gabon, Ghana, Ivory Coast, Liberia, Nigeria, Sierra Leone, and Uganda.

The larval foodplant is unknown and nothing is published on the early stages (egg, larva, pupa).

Cardiac glycosides found in the Imago by Miriam Rothschild[4] indicate that the so-far unidentified larva, most probably, sequesters foodplant toxins which persist through pupation into the imago as an aposematic protection against predation, and therefore that the larval foodplant is probably an asclepiad vine.