To provide a wraparound packing device capable of stable wraparound packing of a stacked product bundle which is prepared by longitudinally stacking a plurality of products.

A product supply position (A) at which to supply a stacked product bundle W downward on a movement route of an elevator 310, a top face folding position at which to fold a sheet S into the top face of the stacked product bundle W, and a transportation starting position from which the wraparound packed stacked product bundle W is transported are sequentially established. The top face folding position is defined as a position where the top face of the stacked product bundle W stops. Wraparound packing is completed by pressing the stacked product bundle W supplied to the product supply position (A) with a press plate 321; bringing down the sheet S and the stacked product bundle W to the top face folding position with the elevator 310 while keeping the pressed state; folding the sheet S into both front and rear sides of the stacked product bundle W in the process of bringing down; and further folding the sheet S into the top face of the stacked product bundle W at the top face folding position.