Abstract: There is described a device which comprises fixed means to feed forks one by one to the stacking location along a path at right angle to the transfer means movement direction between the parallel members and adjacent that edge provided with said perforations of those bags retained by said members, said forks of U-shape being free relative to one another, with legs directed at right angle to the transfer means movement direction and the leg free ends being directed towards the means allowing to release the bags from the transfer means in such a way that the fork legs enter the bag perforations, and means for moving the fork brought to the stacking location and on which will be stacked the bags to form a stack, along a direction in parallel relationship with the legs thereof to let said fork lie in two positions, the one position in which the fork is stationary to allow stacking the bags during said stacking operation and the second position in which the forks is free and can leave by gravity the device with th