Bipartite navicular bone is an uncommon foot pathology that generally occurs in adolescent patients. However, some patients may become symptomatic during adulthood. When conservative treatment fails, surgical treatment is performed. However, due to a lack of high-quality evidence, the optimal surgical strategy for bipartite navicular remains unclear. The talonavicular arthrodesis and internal fixation of the fragment have been reported as the surgical choice of the symptomatic bipartite navicular. The internal fixation of the fragment may have a high risk of postoperative nonunion. However, talonavicular arthrodesis results in the limitation of the motion and function of the midfoot, which may cause dysfunction or osteoarthritis of the adjacent joints. This paper aims to present an adult case of symptomatic bipartite navicular that was treated by the internal fixation of the fragment using screws, with a favorable short-term outcome., Competing Interests: Human subjects: Consent was obtained or waived by all participants in this study. Conflicts of interest: In compliance with the ICMJE uniform disclosure form, all authors declare the following: Payment/services info: All authors have declared that no financial support was received from any organization for the submitted work. Financial relationships: All authors have declared that they have no financial relationships at present or within the previous three years with any organizations that might have an interest in the submitted work. Other relationships: All authors have declared that there are no other relationships or activities that could appear to have influenced the submitted work., (Copyright © 2024, Yokoe et al.)