A surgical staple cartridge, comprising: a cartridge body defining a cartridge axis in a proximal-to-distal direction and comprising a first cartridge wall and a second cartridge wall spaced from said first cartridge wall, said first and second cartridge walls (852, 856) arranged in first and second planes respectively which are parallel to the cartridge axis and on a first side of said cartridge axis, the first and second planes being parallel to each other, said cartridge body further comprising at least two driver guides upstanding in a first direction parallel to the first and second planes (852, 856) and perpendicular to the cartridge axis and located between said first cartridge wall and said second cartridge wall, the at least two driver guides comprising a proximal driver guide arranged proximally to a distal driver guide; at least one surgical staple driver, comprising: a driver body comprising a proximal end configured to slidably engage said proximal driver guide in said first direction and a distal end configured to slidably engage said distal driver guide in said first direction; and at least one staple support member (910, 930, 950), each staple support member (910, 930, 950) configured to operably support a surgical staple (820a-c) thereon, characterized in that: the driver body of said at least one surgical staple driver comprises a proximal hooked-shaped slot when viewed in the first direction that is configured to be engaged by a corresponding hook-shaped portion of the proximal driver guide, and a distal hooked-shaped slot when viewed in the first direction that is opposed to the proximal hooked-shaped slot and that is configured to be engaged by a corresponding hook-shaped portion of the distal driver guide a cartridge body defining a cartridge axis in a proximal-to-distal direction and comprising a first cartridge wall and a second cartridge wall spaced from said first cartridge wall, said first and second cartridge walls (852, 856) arranged in first and second planes respectively which are parallel to the cartridge axis and on a first side of said cartridge axis, the first and second planes being parallel to each other, said cartridge body further comprising at least two driver guides upstanding in a first direction parallel to the first and second planes (852, 856) and perpendicular to the cartridge axis and located between said first cartridge wall and said second cartridge wall, the at least two driver guides comprising a proximal driver guide arranged proximally to a distal driver guide; at least one surgical staple driver, comprising: a driver body comprising a proximal end configured to slidably engage said proximal driver guide in said first direction and a distal end configured to slidably engage said distal driver guide in said first direction; and at least one staple support member (910, 930, 950), each staple support member (910, 930, 950) configured to operably support a surgical staple (820a-c) thereon, characterized in that: a driver body comprising a proximal end configured to slidably engage said proximal driver guide in said first direction and a distal end configured to slidably engage said distal driver guide in said first direction; and at least one staple support member (910, 930, 950), each staple support member (910, 930, 950) configured to operably support a surgical staple (820a-c) thereon, characterized in that: the driver body of said at least one surgical staple driver comprises a proximal hooked-shaped slot when viewed in the first direction that is configured to be engaged by a corresponding hook-shaped portion of the proximal driver guide, and a distal hooked-shaped slot when viewed in the first direction that is opposed to the proximal hooked-shaped slot and that is configured to be engaged by a corresponding hook-shaped portion of the distal driver guide