A surgical stapling apparatus is provided and includes a cartridge assembly defining a tissue contacting surface and a longitudinally extending elongate slot； an anvil assembly defining a tissue contacting surface and a longitudinally extending elongate slot； a surgical buttress releasably secured to at least one of the tissue contacting surface of the cartridge assembly and the tissue contacting surface of the anvil assembly by at least one anchor, a central knife blade slidably disposable in the longitudinal extending elongate slot of the cartridge assembly and the anvil assembly, and a knife blade supported in a distal end portion of at least one of the cartridge assembly and the anvil assembly, wherein the distal knife blade is actuatable by the central knife blade upon an actuation of the central knife blade.
