A high lift system (100) with a main wing (112) and regulating flaps (110), also bearing devices (130) for the mounting of the regulating flaps (110), and positioning devices (120) for the positioning of the regulating flaps (110), wherein the respective bearing device (130) and/or positioning device (120) is at least partially provided with a fairing (118), having a flow control device (10) for purposes of controlling the flow around the high lift system (100) with at least one inlet duct (20) with at least one inlet (22), which device is located on or underneath the lower face (104) of the high lift system (10), wherein at least one outlet duct (30) for air is furthermore provided, which is connected with the inlet duct (20) in a fluid - communicating manner, and has at least one outlet (110), which is located on the upper face (102) in the region of at least one regulating flap of the high lift system (100).