This exhaust gas purification filter (1) has a cell structure part (2), a sealing part (11), and a skin part (12). The cell structure part (2) is configured by a plurality of cells (21) that extend in a filter axial direction (Y) and a porous partition wall (22) that partitions the plurality of cells (21) in a grid shape. The skin part (12) has a cylindrical shape and is formed on the outer periphery of the cell structure part (2). The porosity of the partition wall (22) is 50-70%. The thickness T of the skin part (12) is 0.3-1.0 mm. An outer edge (213) of the cell (21) is rounded at an intersection position (225) of the partition wall (22), and the radius R of curvature at the intersection position (225) is 0.02-0.6 mm. The distortion degree δ, which is the degree of change in the external dimension of the exhaust gas purification filter (1) in the filter axial direction (Y), is larger than 0 and equal to or smaller than 1.5 mm. The structure variable X represented by Equation (1) is 0.05-6.　X=T×R/δ…Equation (1).