The loss and mismanagement of suitable habitat, fragmentation of smaller woods and the grubbing out of hedgerows are the main factors threatening Muscardinus avellanarius.
Climate adds to the overall problem, as dormice prefer a clear distinction between seasons. Mild winters cause hibernation to be interrupted and the animal loses energy, while cool summers mean that less food is available at critical times.
Muscardinus avellanarius is considered as a "Lower Risk" sub-category "near threatened" species by the IUCN Red List.