An inorganic fiber-formed article, comprising: inorganic fibers; and needle marks extending in a thickness direction and including vertical bundles composed of the inorganic fibers extending in the thickness direction, wherein the inorganic fiber-formed article has a basis weight of 1,800 g/m 2 or more, in the case where a peel test described below is performed, when the vertical bundles having a diameter of 100 μm or more and a protruding length of 2 mm or more among all the vertical bundles protruding from a first peeled surface and a second peeled surface in a region measuring 50 mm × 50 mm are expressed as effective vertical bundles, at least one of characteristics and described below is satisfied, an average volume of the effective vertical bundles per needle mark determined by dividing a total volume of portions of the effective vertical bundles protruding from the peeled surfaces in the region by the number of the needle marks in the region is 0.5 mm 3 or more, and an average volume of a portion of each of the effective vertical bundles protruding from the peeled surfaces in the region is 1.0 mm 3 or more, and wherein the <peel test> is performed as follows: a test specimen having a width of 50 mm and a length of 150 mm is cut out from the inorganic fiber-formed article, a cut having a depth of 30 mm is made in a middle of a thickness of an end face of the test specimen, and both ends formed by the cut are held by gripping jigs, mounted on a tensile testing machine, and pulled in opposite thickness directions at a speed of 500 mm/min into two pieces. inorganic fibers; and needle marks extending in a thickness direction and including vertical bundles composed of the inorganic fibers extending in the thickness direction, wherein the inorganic fiber-formed article has a basis weight of 1,800 g/m 2 or more, in the case where a peel test described below is performed, when the vertical bundles having a diameter of 100 μm or more and a protruding length of 2 mm or more among all the vertical bundles protruding from a first peeled surface and a second peeled surface in a region measuring 50 mm × 50 mm are expressed as effective vertical bundles, at least one of characteristics and described below is satisfied, an average volume of the effective vertical bundles per needle mark determined by dividing a total volume of portions of the effective vertical bundles protruding from the peeled surfaces in the region by the number of the needle marks in the region is 0.5 mm 3 or more, and an average volume of a portion of each of the effective vertical bundles protruding from the peeled surfaces in the region is 1.0 mm 3 or more, and wherein the <peel test> is performed as follows: a test specimen having a width of 50 mm and a length of 150 mm is cut out from the inorganic fiber-formed article, a cut having a depth of 30 mm is made in a middle of a thickness of an end face of the test specimen, and both ends formed by the cut are held by gripping jigs, mounted on a tensile testing machine, and pulled in opposite thickness directions at a speed of 500 mm/min into two pieces. an average volume of the effective vertical bundles per needle mark determined by dividing a total volume of portions of the effective vertical bundles protruding from the peeled surfaces in the region by the number of the needle marks in the region is 0.5 mm 3 or more, and an average volume of a portion of each of the effective vertical bundles protruding from the peeled surfaces in the region is 1.0 mm 3 or more, and wherein the <peel test> is performed as follows: a test specimen having a width of 50 mm and a length of 150 mm is cut out from the inorganic fiber-formed article, a cut having a depth of 30 mm is made in a middle of a thickness of an end face of the test specimen, and both ends formed by the cut are held by gripping jigs, mounted on a tensile testing machine, and pulled in opposite thickness directions at a speed of 500 mm/min into two pieces.