Hypnovenator (meaning "sleep hunter") is an extinct genus of troodontid theropod dinosaurs from the Early Cretaceous (Albian) Ohyamashimo Formation of Japan.

The Hypnovenator holotype specimen, MNHAH D1033340, was discovered in sediments of the Ohyamashimo Formation (lower Sasayama Group) in Nishikosa, Tamba-Sasayama city, of Hyōgo Prefecture, Japan.

Subsequent expeditions in July of the following year by the prefecture's Museum of Nature and Human Activities revealed an additional block containing material belonging to the same individual.

[4] In mid-2024, Katsuhiro Kubota, Yoshitsugu Kobayashi, and Tadahiro Ikeda described Hypnovenator matsubaraetoheorum as a new genus and species of troodontid dinosaurs based on these fossil remains.

[7] Kubota et al. recovered it as a basal member of the Troodontinae, as the sister taxon of the younger Mongolian Gobivenator, making Hypnovenator the oldest known troodontine.