A vehicle body structure (10) including a tailgate opening (13) provided in a vehicle body rear part (12) and a tailgate (15) supported by the vehicle body rear part (12) for opening/closing the tailgate opening (13) is disclosed. The tailgate (15) includes a tailgate body (26) supported by the vehicle body rear part (12), a door opening (31) formed in the tailgate body (26), a sub-door (35) supported by the tailgate body (26) for opening/closing the door opening (31), and a high-mount stop lamp (39) disposed so as to avoid the sub-door (35).