The office of the judge is organized by the rules of the Code of civil procedure: the judge must solve the litigations in law, and that, in order to do that, he benefits from the right to raise his own motion. This mission raises a particular difficulty in consumer law, especially regarding the law of the unfair clauses and consumer credit: these fields imply taking into consideration the contractual imbalance due to the weakness of the consumer. The office of the judge is confronted to the necessity to protect this « weak party », which raises the question of knowing if the judge has the right to raise his own motion. The difficulty of the answer opens a rich controversy (Part 1): the legislator, at the whim of the reforms, and the judge, ...