Abstract: A method and apparatus for changing rotatable magnetron sputtering targets is disclosed in which the new target is contained within one of a pair of holding chambers which can be alternately moved into alignment with the axis of the target contained in the sputtering chamber. The empty receiving chamber is aligned with the target to be removed and the target is withdrawn into the receiving chamber after both holding or receiving chambers have been pumped down to a vacuum near that of the sputtering chamber. With the old target in one of the chambers, both chambers are shifted to place the receiving chamber with the new target into position in alignment with the axis of the sputtering chamber. The new target is inserted into the sputtering chamber from the holding chamber without loss of vacuum in the sputtering chamber so that sputtering can be resumed without being contaminated by changing targets.