Oxybelus

thumb|thumbtime=1:31.6|Oxybelus argentatus carrying a stiletto fly ([[Thereva sp.) into her nest.]]

Oxybelus is a genus of wasps in the family Crabronidae, commonly known as "spiny digger wasps". The species are found worldwide except in the Australasian realm. They are especially represented in the Palearctic. Oxybelus is the largest genus in Crabronidae, with 264 species known.