The invention relates to an adjusting device for the longitudinal adjustment of an automotive component, especially a vehicle seat. The adjusting device comprises an upper longitudinal rail with respect to the adjusting device and a lower longitudinal rail with respect to the adjusting device. The adjusting device comprises a locking device in such a manner that when the locking device is activated, a relative adjustment of the longitudinal rails in relation to each other can be blocked and when the locking device is released, the longitudinal rails can be unblocked. The locking device comprises a plurality of detent pins, at least one detent pin being adjusted in the locking position to lock the longitudinal rails and all detent pins being adjusted in a release position to release the longitudinal rails. The detent pins have a detent profile that is designed in such a manner that a first front section of the detent pin has a flare angle and a second section of the detent pin has a transition.