A box gluing device for attaching a glue tab of a box blank to an opposing panel when the box blank is folded so the glue tab is position at an edge of the box blank. The gluing device includes a support structure upon which a gluing apparatus and a support plate are mounted. The gluing apparatus a glue dispensing nozzle for applying glue on one or more surfaces of the box blank. The box blank can be moved through the gluing device to attach the glue tab to the opposing panel. As the box blank moves through the gluing device, a guide rail orients the glue tab in a desired manner while glue is applied to the box blank, and a roller assembly presses the glue tab and the opposing panel together with the glue therebetween. Alternatively, the gluing device can include a clamp arm that holds the box blank in place while glue is applied, and a folding bar that folds the glue tab onto the opposing panel after glue is applied.