Abstract: A disc tumbler lock, which comprises a lock case, which includes a bolt displaceable with a key of the lock and a number of locking discs provided with locking channels and which are displaceable with the key of the lock against the force of a spring to open the lock and for guiding the movements of which the lock case is provided with stationary guiding members, and a locking pin dependent on the movements of the bolt and which is arranged to cooperate with the locking channels of the locking discs. At least one of the locking discs is equipped with gripping structure, which, when the bolt is pressed inwards to the lock case, are arranged to cooperate with counter structure arranged in the lock case for preventing the displacement of the at least one locking disc.