A pod opener is an apparatus for purging the inside of a reticle pod having a pod cover and an openable bottom lid by supplying and discharging a clean gas to and from the inside of the reticle pod. The pod opener includes a stage, an elevator driving mechanism, a latch mechanism, and a supplying-discharging section. The stage can attach and remove the bottom lid to and from the pod cover. The elevator driving mechanism can move the stage. The latch mechanism serves to move a latch member that locks the bottom lid to the pod cover such that it cannot be detached and to release the locked state of the bottom lid. The supplying-discharging section starts purging before the latch member has completed an operation of locking the bottom lid to the pod cover.