Streszczenie
In this chapter I present both the situation of an encounter between the homeless and the researcher and a multiplication of challenges and doubts they face in the course of participatory research. My contribution starts with the characteristics of the first meeting (“the opening of relation: the homeless – the researcher”), in which I try to find something in common between “us” (“adjustment process between the researcher and the homeless”), so to get then to the point of “coexistence of the homeless and the researcher biographies”. These phases of a continuous process let the researcher achieve an “understanding” perspective in her research. At the same time close, the relationship between the homeless and the researcher reveals how the “professional” and “non-professional” meaning of biography is hard to distinguish, leading rather to coherence and to construction of a shared biography line.