A surgical stapler instrument with an auxiliary tissue compression means for stapling a tissue with a plurality of staples comprises； a handle, an elongate shaft having a proximal end and a distal end extending therefrom, operatively coupled to said handle, and an elongate end effector having a proximal end attached to said distal end of said shaft, a distal end extending therefrom； said end effector comprising a first jaw member having an anvil thereon and a second jaw member, opposing said first jaw member, having a staple cartridge housing a plurality of staples therein and a cartridge bay configured to releasably receive said staple cartridge, and a compression bladder disposed between cartridge bay and said staple cartridge or driving at least a portion of said staple cartridge toward said first jaw member； said jaw members movable with respect to each other from an open position, wherein said jaw members are spaced apart, to a closed position wherein said jaw members are in close approximation to one another.
