The 48 years old female who complained of painful swelling with discharge on the medial end of the left clavicle which has been lasting 3 months. We experienced arare case of tuberculosis that involved only the clavicle without other involvement. Diagnostic disturbance delayed appropriate medical therapy, leading to development of a discharging sinus with secondary infection, which further confused pathologic feature. The ability of this disease to mimic many skeletal pathologies, this has to be included in the differential diagnosis, especially at unusual sites.