Cassida panzeri is a species of beetle in the leaf beetle family, that can be found in the Palearctic region, and in the Honshu province of Japan. The host plants are in the Asteraceae family, and include Arctium lappa, Scorzonera humilis, Taraxacum officinale, Tragopogon pratensis and Cirsium species (including Cirsium arvense and Cirsium vulgare).