Fibrous dysplasia is a benign skeletal developmental anomaly where normal bone is replaced by fibrous tissue. There is a defect in osteoblastic differentiation and maturation of normal bone, which results in formation of structurally weak bone. Disease can affect one bone (monostotic) or multiple bones (polyostotic). Fibrous dysplasia usually involves femur, tibia, pelvis, ribs and skull. It rarely occurs in bones of hands and feet. We report a case of fibrous dysplasia of proximal phalanx of left middle finger in a 10 year old female.