It is now admitted that part-time work emphasizes the inequalities between the sexes in both spheres of work and family, but this article rather focuses on the cleavages among women themselves. An analysis is provided of how working time and the company's position combine so as to produce inequalities among female wage-earners, assigning them heterogeneous statuses, thus exposing some of them to precarious employment, working and living conditions. The study concentrates on chambermaids working part-time and full-time in the French subcontracting context of cleaning companies. Part-time work stresses and confirms the differentiations produced by subcontracting and worsens the inequalities within this group of female workers who yet do the same tasks. These cleavages have set off strikes, and the analysis of this labor dispute sheds light on some social relations running through the firm, as well as the invisible concerns for the employment and work of these women working behind the scenes.