An apparatus (1) for moulding plastic preforms into plastic containers having at least one blow mould (2), within which the plastic preforms may be expanded into plastic containers, wherein the blow mould (2) has at least two blow mould parts (2a, 2b) which are movable relative to each other, including an application device (4) which is movable relative to the blow mould (2), in order to apply pressure onto the plastic preform for the expansion thereof; wherein at least one area (22) of the blow mould (2) may be tempered. According to the invention, the apparatus (1) has a tempering body (10) which may be separated from the blow mould (2) in its entirety for tempering the area of the blow mould (2).