''Xylocopa valga'' is a species of carpenter bee common to: western, central and southern Europe, except for far northern latitudes; the Caucasus; Middle East; Central Asia; and Mongolia. The solitary bee has a black and blue coloured body, 20–27 mm in length, and densely covered with purple hairs. The small wings also have a purple tint. The bee creates cavity nests by gnawing the wood in the trunks of dead trees and in old wooden structures. It inhabits both forests and urban areas.