Oreina cacaliae is a species of broad-shouldered leaf beetles belonging to the family Chrysomelidae, subfamily Chrysomelinae.
Oreina cacaliae can reach a length of . Elytra are bright metallic bluish or greenish, with darker longitudinal stripes. The main host plants are Adenostyles alliariae and Petasites paradoxus.
This broad-shouldered leaf beetle can be found in Europe (Alps, Sudetes, Carpathian Mountains).
Oreina cacaliae prefers middle and high mountain areas, at an elevation up to above sea level.