In the context of an increasing number of doctoral studies on the African continent, there is a paucity of research examining the daily relationship between supervisors and doctoral students in Francophone sub-Saharan Africa. Consequently, the experience of doctoral students in this field is under-debated, under-questioned, under-analysed and under-taken into account. This is despite the fact that it is central to the success or failure of the thesis process. This paper aims to reflect on postgraduate study conditions in the context of the relationship between supervisor and candidate in francophone West Africa. A qualitative study based on conversational interviews with PhD students and supervisors, was conducted at the University of Abomey-Calavi, the main public university in Benin, with 58 doctoral programmes, and statistical data issued by the university analyzed. The paper examines the conditions of suffering at various levels for PhD candidates, the asymmetrical power relation between supervisors and candidates and silo's logics which driven them. The paper demonstrates how the thesis process is complex as asymmetrical, power and conflict-prone. It also point that de the nature of doctoral work, doctoral students are exposes to various psychological, psychic and mental pressures that supervisors have to manage.