After a hip prosthesis, an increasingly targeted goal is hip forgetfulness. What about this result in Benin. Objective: To study hip forgetting after hip prosthesis in Benin. Methods: Prospective study with a descriptive and analytical aim carried out from February to October 2019. It focused on patients with prosthesis of a single hip for at least 3 months in hospitals in Cotonou and surroundings, without comprehension disorders or other pathologies causing locomotor system disability and who consented to participate in the study. The “Forgotten Joint Score -12” (FJS-12) and the “Hip disability and Osteoarthritis Outcome Score” (HOOS) were the tools to assess, respectively, the forgetfulness and functionality of the prosthetic hip of patients. Results: The mean age of patients was 52.90 ± 16.76 years. The sex ratio was 1.31. These were mainly cases of PTH (88.64%), first-line (86.36%). Only one patient between four had actually forgotten his hip. The latter was significantly associated mainly with the parameters of functional capacities of the hip. Conclusion: Hip forgetting still remains a major challenge in hip replacement patients in Benin. The role of functional rehabilitation in achieving this goal is legitimate, showing the need to collaborate between specialties in the care of these patients.