Abstract
The reception of the matter of the fundamental rights of the employee in the company has generated several juridical debates, important for the Labor Law. One of them is the possibility that the exercise of said rights by the worker is limited by the requirements arising from the principle of contractual good faith. A community where such a discussion has had special importance is the Spanish labor doctrine. The revision of this debate on the role of the good faith regarding the exercise of the fundamental rights of employees is the aim of this article, especially in terms of the proportionality principle.