This text is a reflection on the concept of hospitality in the school. It maintains that the school must be hospitable if it wishes to remain true to its Idea. Hospitality is a characteristic of the school milieu. But hospitality cannot simply be reduced to the question of welcoming, as is so often thought; it is also a matter of pedagogy and of ethics. This is the central theme proposed in this text. From the school institution to the ethics of the professor, this text aims to define the principle of hospitality in the school by presenting the different aspects of the concept and by demonstrating how in the end, these are intimately linked.