“People resemble their times more than they resemble their parents.” How true is this arab proverb! Behind this proverb is hidden a universal concept: the concept of generation. This concept based on age implies some characteristics specific to each group.Those characteristics have long been subject to studies aiming at providing a better understanding of the intergenerational relations. Yet, few studies focus on the perceptions of the generations as a relational factor. In this thesis research, we want to focus on those perceptions and misperceptions that one generation can have of the others. Are there many differences between generations? Do they perceive the others the way they are? We will attempt to answer to those questions. We also want to give in this research an overview of the stakes represented by the combination between intergenerational relationships and the knowledge transfer in organizations. Indeed, we realize that within a decade, the mass departure of Baby boomers from the workplace will have significant consequences on the knowledge management field. Yet, what we see today is that only few companies worry about this huge human capital loss. It is time for leaders to react now if they do not want to lose their competitive advantage: knowledge transfer is a continuous process. And we hope that this work will provide some insights on the questions of intergenerational knowledge transfer to our readers.