T-condylar fracture is a type of distal humerus fracture. T-condylar fracture in children is rare, with reported incidence of less than 1% of T-condylar fractures. The mean reported age of T-condylar fracture in children is 11. Cases in children under 5 years-old are extremely rare. Herein, we report on a T-condylar fracture of the distal humerus in a 5-year-old boy. This patient was treated with open reduction and K-wire fixation through the posterolateral approach. The result of treatment was satisfactory; therefore, we report this case.