Abstract: An apparatus for creating an ordered stack of bags is herein disclosed. A stack apparatus according the present invention comprises a stacking conveyor mounted within a framework constructed and arranged such that the stacking conveyor is moveable vertically and laterally with respect to the framework. The stacking conveyor is moveable between a bag receiving position in which a filled bag is deposited on the input end of the conveyor and any one of a number of vertically and laterally predefined stacking positions in which the stacking conveyor conveys the filled bag onto a stack. The present invention may have a self adjusting supply conveyor secured directly thereto to obviate the need to return to a distinct bag receiving position. In addition, the stacking apparatus may be used in conjunction with a moveable skid for stacking bags in locations remote from the stacking apparatus, or may be constructed and arranged from movement directly to a location where bags are to be stacked.