Bec Abbey (French: Abbaye Notre-Dame du Bec) in Le Bec Hellouin, Normandy, France, once the most influential abbeys in the Anglo-Norman kingdom of the twelfth century, is a Benedictine monastic foundation in the Eure département, in the Bec valley midway between the cities of Rouen and Bernay.

Like all abbeys, Bec maintained annals of the house, but uniquely its first abbots also received individual biographies, brought together by the monk of Bec, Milo Crispin. Because of the abbey's cross-Channel influence, these vitae sometimes disclose historical information of more than local importance.