The present invention finds application in the art of sport and leisure accessories, and relates to a ventilated bicycle handlebar which comprises a tubular body (2) having an axial inner cavity (3), a center portion (4) for connection to a bicycle frame (T) and end portions (5, 5'), designed to be grasped by the hands of a user. The tubular body (2) has at least one air inlet (6) at the center portion (4) and at least one air outlet (7) in the remaining areas. The inlet (6) is at least partly oriented in the riding direction so that the incoming air can flow through the inner cavity (3) and come out of the outlet (7) to ventilate the hands of a user during riding.