The invention relates to a device (100) for sterilizing plastic parisons (1), with a sterilization chamber (3) and a transport device (2) disposed at least partially inside the sterilization chamber (3) for moving the plastic parisons (1) within the sterilization chamber (3), wherein the transport device (2) has at least one gripping system (4) for engaging round and supporting the plastic parisons (1) by means of a gripping clamp (41), wherein the gripping system (4) has a displacement means (5) for displacement during sterilization within the sterilization chamber of contact surfaces (1A) of the plastic parisons (1) which are shielded by the gripping system (4) from a sterilizing medium and/or sterilizing radiation.