Neomochtherus geniculatus is a species of fly in the robber fly family, Asilidae.
This species is present in Europe.
Neomochtherus geniculatus can reach a body length of about . These robber flies have a small facial gibbosity with a few bristles forming the mystax. Sternites are predominantly shiny. Femora are black. The widest point of the distinctly broadened hypopygium is in the middle.
Adults can be found from May to September. Larvae feed on beetle larvae of the families Cetoniidae, Lucanidae and Melolonthidae, while adults prey on other flies.