A wall-flow-type exhaust gas purification catalyst to be placed in an exhaust pipe of an internal combustion system to purify exhaust gas emitted from the internal combustion system, the exhaust gas purification catalyst comprising: a substrate having a wall-flow structure with an exhaust inlet-side end and an exhaust outlet-side end, the substrate having an entrance cell that is open on the exhaust inlet-side end and an exit cell that is open on the exhaust outlet-side end, separated with a porous partition wall, a first catalytic layer provided to an internal portion of the partition wall in contact with the entrance cell, having a length L 1 from the exhaust inlet-side end in the running direction of the partition wall with L 1 being less than the total length L w of the partition wall in the running direction, a second catalytic layer provided to an internal portion of the partition wall in contact with the exit cell, having a length L 2 from the exhaust outlet-side end in the running direction of the partition wall with L 2 being less than the total length L w of the partition wall in the running direction; wherein in the internal portion of the partition wall in contact with the entrance cell, near the exhaust outlet-side end, the exhaust gas purification catalyst has a substrate-exposing segment (26N1) free of the first and second catalytic layers (261, 262), and the first catalytic layer has a coating density D 1 and the second catalytic layer has a coating density D 2 with a D 2 /D 1 ratio value of 1.01 or higher, but 1.4 or lower, wherein the partition wall has a total thickness T w in a direction perpendicular to the running direction of the partition wall, the first catalytic layer has a thickness T 1, the second catalytic layer has a thickness T 2, the purification catalyst being characterised in that the first and second catalytic layers (261, 262) are formed to partially overlap each other in the thickness direction, with T w, T 1 and T 2 satisfying the following inequality: T w < T 1 + T 2 < 2 T w. a substrate having a wall-flow structure with an exhaust inlet-side end and an exhaust outlet-side end, the substrate having an entrance cell that is open on the exhaust inlet-side end and an exit cell that is open on the exhaust outlet-side end, separated with a porous partition wall, a first catalytic layer provided to an internal portion of the partition wall in contact with the entrance cell, having a length L 1 from the exhaust inlet-side end in the running direction of the partition wall with L 1 being less than the total length L w of the partition wall in the running direction, a second catalytic layer provided to an internal portion of the partition wall in contact with the exit cell, having a length L 2 from the exhaust outlet-side end in the running direction of the partition wall with L 2 being less than the total length L w of the partition wall in the running direction; wherein in the internal portion of the partition wall in contact with the entrance cell, near the exhaust outlet-side end, the exhaust gas purification catalyst has a substrate-exposing segment (26N1) free of the first and second catalytic layers (261, 262), and the first catalytic layer has a coating density D 1 and the second catalytic layer has a coating density D 2 with a D 2 /D 1 ratio value of 1.01 or higher, but 1.4 or lower, wherein the partition wall has a total thickness T w in a direction perpendicular to the running direction of the partition wall, the first catalytic layer has a thickness T 1, the second catalytic layer has a thickness T 2, the purification catalyst being characterised in that the first and second catalytic layers (261, 262) are formed to partially overlap each other in the thickness direction, with T w, T 1 and T 2 satisfying the following inequality: T w < T 1 + T 2 < 2 T w.