This main focus of this thesis is the subjective life world of homeless people. This is investigated by means of an innovative research approach in the context of a participatory photography project with visitors of the Caritas Day Centre at the Vienna Central Railway Station. Based on the methodology of generative picturing, the participants took photos of their everyday lives and subsequently discussed these in period group meetings. The results of this research demonstrates main aspects of their lives, which should thus be taken into account in professional social work. These include feelings of isolation and their needs for social relationships, social belonging and normality, aspects which are often missed out by traditional assistance to the homeless with its main focus on material safeguarding such as income, living space and work. Furthermore, the photographic confrontation of participants with their lives makes visible their various coping strategies in public and institutional spaces, which stand out for their positive attitude and proactive behavior. This work calls on professional social workers involved in low-threshold assistance to the homeless to promote, next to basic care, also further recreational, creative and cultural activities and projects for service-users, with the goal to create spaces for meeting and exchange as well as to foster feelings of belonging and experiences of self-effectiveness. Finally, this work also intends to illuminate the potential of photographic and visual methods for theory formation in social work science.