__Abstract__ The Rome I Regulation on the law applicable to contractual obligations contains several provisions aimed explicitly at the protection of ‘weaker’ contracting parties, such as consumers and employees. However, in addition to this, the interests of weaker parties are sometimes also safeguarded through the application of ‘overriding mandatory provisions’, which are superimposed on the law applicable to the contract to protect a fundamental interest of a Member State. This article is an attempt to clarify the extent to which the concept of overriding mandatory provisions may serve as a vehicle for weaker party protection. To do this, it examines the definition and limitations of the concept and its relation to conflict of laws r...