These Biographical Notes aim to provide the reader with brief glimpses of the academic and geographical contexts in which Bruner has developed most of a work that constitutes, not only for psychologists and educators, an important reference for the second half of this century. The context is important to be able to understand the original character and the pleasure of discovery that the construction of knowledge entails, whether it is a child or a scientist who embarks on that adventure. And it is important to identify, in order to understand the different sections or stages traveled, both the "allies" in each of these companies and the "opponents" whom it is intended to refute, more numerous, throughout such a long and fruitful intellectual career. , which should be noted in these Notes.