The invention relates to a device (1) for generating and/or boosting a vacuum in a motor vehicle, in particular in order to operate a vacuum brake force booster, comprising a throttle unit (2) which has at least one throttle flap housing (3) and a throttle flap (5), which is arranged in a throttle duct (4) in the throttle flap housing (3) so as to be rotatable within an angular range, for controlling a fluid flow in the throttle duct (4), the device (1) also comprising means for generating and/or boosting a vacuum, the means being embodied as vacuum boosting means which are integrated into the throttle flap housing (3) and act according to Bernoulli’s principle in the manner of a suction jet pump in order to generate a boosted vacuum for at least one brake force booster. This results in a device (1) for generating and/or boosting a vacuum in a motor vehicle which can be used without external arrangements and without electrical actuation and, when the internal combustion engine is at idle or in the overrun mode, provides a boosted vacuum for operating a pneumatic brake force booster.