Deraeocoris ruber is a species of bug in the family Miridae.

This species can be found anywhere in Europe, except for Azores, Canary Islands, Cyprus, Faroe Islands, Finland, Iceland, Malta and parts of Russia and the Caucasus.

Deraeocoris ruber is a medium-size species measuring 6–8 millimetres (0.24–0.31 in) long.

They have shiny forewings with an unbanded tibiae and the 1st antennal segment.

They can be found on various plants, especially on nettles,[3] but also on Rubus, Cytisus and Thistles.