Pocket spring mattress comprising a one-piece spring cage having a first end and an opposite second end, the distance between the first end and the second end being the length of the spring cage, a first side and an opposite second side, each of which connecting the first end to the second end, the distance between the first side and the second side being the width of the spring cage, a top side and an opposite bottom side, wherein the distance between the top side and the bottom side is the height of the spring cage, wherein the top side is set up as a support surface and the bottom side faces a slatted frame when the mattress is arranged on the latter, wherein the spring cage in parallel to the width is divided into zones of different spring firmness arranged, and further comprising a first cover which adjoins the top side of the spring cage and rests over the entire surface thereof, characterised in that in that the spring cage, starting from the first end, successively comprises a first head region, a first shoulder region, a first lumbar region, a pelvic region, a second lumbar region, a second shoulder region and a second head region, wherein the first head region has the same degree of hardness as the second head region and the first lumbar region has the same degree of hardness as the second lumbar region and the spring cage has a first shoulder region of a first spring hardness and a second shoulder region of a second spring hardness, wherein the first spring hardness is different from the second spring hardness, wherein a lower degree of hardness is formed by the springs having a smaller diameter and consisting of spring wire of the same thickness and hardness as springs of a region with a higher degree of hardness and characterised in that a circumferential strip steel is arranged between a row of springs arranged adjacent to the circumference of the spring cage and a row of springs adjacent thereto. a first side and an opposite second side, each of which connecting the first end to the second end, the distance between the first side and the second side being the width of the spring cage, a top side and an opposite bottom side, wherein the distance between the top side and the bottom side is the height of the spring cage, wherein the top side is set up as a support surface and the bottom side faces a slatted frame when the mattress is arranged on the latter, wherein the spring cage in parallel to the width is divided into zones of different spring firmness arranged, and further comprising a first cover which adjoins the top side of the spring cage and rests over the entire surface thereof, characterised in that in that the spring cage, starting from the first end, successively comprises a first head region, a first shoulder region, a first lumbar region, a pelvic region, a second lumbar region, a second shoulder region and a second head region, wherein the first head region has the same degree of hardness as the second head region and the first lumbar region has the same degree of hardness as the second lumbar region and the spring cage has a first shoulder region of a first spring hardness and a second shoulder region of a second spring hardness, wherein the first spring hardness is different from the second spring hardness, wherein a lower degree of hardness is formed by the springs having a smaller diameter and consisting of spring wire of the same thickness and hardness as springs of a region with a higher degree of hardness and characterised in that a circumferential strip steel is arranged between a row of springs arranged adjacent to the circumference of the spring cage and a row of springs adjacent thereto.