Acanthocercus cyanocephalus, also commonly known as Falk's blue-headed tree agama, is a species of lizards in the family Agamidae.

It can be found in Angola, Namibia, Zambia, and the Democratic Republic of the Congo.

With a maximum length of up to 350 millimeters, the tree agama is large in its genus; however, its tail is small when compared with its size.

Male lizards, with their blue heads, spotted bodies, and multipatterned tails, are clearly distinct from all other species.

Blue-headed tree agamas are known to eat arthropods including spiders, caterpillars, ants, and termites.