Oreina cacaliae is a species of broad-shouldered leaf beetles belonging to the family Chrysomelidae, subfamily Chrysomelinae.

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 2,000 metres (6,600 ft) above sea level.