The Robec (Old Norse raudh, red and bekkr, stream) is a small river in Seine-Maritime, Normandy, France, right tributary of the Seine. Its length is 9 km. The river begins near Fontaine-sous-Préaux, then it flows through Darnétal and ends in the Seine in Rouen. Its drainage area includes the Aubette.
In order to avoid a repetition of the floods that have affected the valleys of the Cailly, the Robec and the Aubette, a schéma d'aménagement et de gestion des eaux (water resource management scheme) is under consideration.