A manufacturing apparatus for a stretch-formed product, the manufacturing apparatus comprising: a die (11; 61) and a blank holder (12; 62) which have clamping surfaces (11a, 12a) facing each other; and a punch that, in a state where a margin of a blank (14; 54) of a sheet material is clamped by the clamping surfaces (11a, 12a) of the die (11; 61) and the blank holder (12; 62), relatively presses a forming region of the blank (14; 54) into the die (11; 61) and thereby performs stretch forming on the forming region of the blank (14; 54); and lock beads (15, 16; 17, 18) that are provided on the clamping surfaces (11a, 12a) of the die (11; 61) and the blank holder (12; 62) in mutually similar shapes and have first surfaces (15-1, 16-1; 17-1,18-1), second surfaces (15-2, 16-2; 17-2,18-2) that intersect with the first surfaces (15-1, 16-1; 17-1,18-1), and third surfaces (15-3, 16-3; 17-3,18-3) that intersect with the second surfaces (15-2, 16-2; 17-2,18-2) from outer edges toward the centers of the die (11; 61) and the blank holder (12; 62), the first surfaces (15-1, 16-1; 17-1,18-1) each having a plurality of depression-protrusion parts, wherein the plurality of depression-protrusion parts each have a fourth surface (15-4, 16-4; 17-4,18-4) and a fifth surface (15-5, 16-5; 17-5,18-5) intersecting with each other, the fourth surface (15-4, 16-4; 17-4,18-4) and the fifth surface (15-5, 16-5; 17-5,18-5) intersect with the second surface (15-2, 16-2; 17-2,18-2), and at least one of the fourth surface (15-4, 16-4; 17-4,18-4) and the fifth surface (15-5, 16-5; 17-5,18-5) intersects with the first surface (15-1, 16-1; 17-1,18-1), characterized in that the plurality of depression-protrusion parts each have the fourth surface (15-4, 16-4) and a sixth surface (15-6, 16-6) facing each other and the fifth surface (15-5, 16-5) that intersects with the fourth surface (15-4, 16-4) and the sixth surface (15-6, 16-6), the fourth surface (15-4, 16-4), the fifth surface (15-5, 16-5) and the sixth surface (15-6, 16-6) intersect with the second surface (15-2, 16-2), and at least one of the fourth surface (15-4, 16-4; 17-4,18-4), the fifth surface (15-5, 16-5) and the sixth surface (15-6, 16-6) intersects with the first surface (15-1, 16-1). a die (11; 61) and a blank holder (12; 62) which have clamping surfaces (11a, 12a) facing each other; and a punch that, in a state where a margin of a blank (14; 54) of a sheet material is clamped by the clamping surfaces (11a, 12a) of the die (11; 61) and the blank holder (12; 62), relatively presses a forming region of the blank (14; 54) into the die (11; 61) and thereby performs stretch forming on the forming region of the blank (14; 54); and lock beads (15, 16; 17, 18) that are provided on the clamping surfaces (11a, 12a) of the die (11; 61) and the blank holder (12; 62) in mutually similar shapes and have first surfaces (15-1, 16-1; 17-1,18-1), second surfaces (15-2, 16-2; 17-2,18-2) that intersect with the first surfaces (15-1, 16-1; 17-1,18-1), and third surfaces (15-3, 16-3; 17-3,18-3) that intersect with the second surfaces (15-2, 16-2; 17-2,18-2) from outer edges toward the centers of the die (11; 61) and the blank holder (12; 62), the first surfaces (15-1, 16-1; 17-1,18-1) each having a plurality of depression-protrusion parts, wherein the plurality of depression-protrusion parts each have a fourth surface (15-4, 16-4; 17-4,18-4) and a fifth surface (15-5, 16-5; 17-5,18-5) intersecting with each other, the fourth surface (15-4, 16-4; 17-4,18-4) and the fifth surface (15-5, 16-5; 17-5,18-5) intersect with the second surface (15-2, 16-2; 17-2,18-2), and at least one of the fourth surface (15-4, 16-4; 17-4,18-4) and the fifth surface (15-5, 16-5; 17-5,18-5) intersects with the first surface (15-1, 16-1; 17-1,18-1), characterized in that the plurality of depression-protrusion parts each have the fourth surface (15-4, 16-4) and a sixth surface (15-6, 16-6) facing each other and the fifth surface (15-5, 16-5) that intersects with the fourth surface (15-4, 16-4) and the sixth surface (15-6, 16-6), the fourth surface (15-4, 16-4), the fifth surface (15-5, 16-5) and the sixth surface (15-6, 16-6) intersect with the second surface (15-2, 16-2), and at least one of the fourth surface (15-4, 16-4; 17-4,18-4), the fifth surface (15-5, 16-5) and the sixth surface (15-6, 16-6) intersects with the first surface (15-1, 16-1).