This thesis compares the pre-contractual obligations in France and the United States. The focus of this study is to analyze how both legal systems deal with these pre-contractual obligations. It focuses on the possibilities given to the parties to protect themselves during the negotiation process. In event of breach of negotiations, the law gives legal remedies to the parties. French and American laws have a different analysis of the problem but they reach similar result: liability under contract law when a contract has been formed or a tentative agreement, or under tort law when no agreement whatsoever has been reached.