A cutting device for cutting a sheet material out of a sheet base material by shearing, the cutting device comprising: a lower die; and an upper die that is movable relative to the lower die, wherein: the lower die has a first lower-die edge extending along an outline shape of the sheet material, and a plurality of second lower-die edges disposed vertically below the first lower-die edge and each extending in a direction traversing an offcut of the sheet base material that is left behind after the sheet material is punched out; the upper die has a first upper-die edge that extends along the first lower-die edge, and a plurality of second upper-die edges that is provided so as to be protrusible to vertically below the second lower-die edges; the lower die has a support part that supports the sheet material punched out of the sheet base material, and an outer edge of an upper end surface of the support part includes the first lower-die edge; the upper die has a frame-shaped part provided so as to surround the first lower-die edge, and an inner edge of a lower end surface of the frame-shaped part includes the first upper-die edge; the lower die has a third lower-die edge extending so as to surround the first lower-die edge; the upper die has a third upper-die edge extending along the third lower-die edge; and wherein the lower die and the upper die are arranged such that in use, the sheet base material is shorn to punch out the sheet material between the first upper-die edge and the first lower-die edge; and the offcut is shorn and divided between the second upper-die edges and the second lower-die edges; wherein when protruded vertically downward, the second upper-die edges are arranged to be inserted into a clearance between the first lower-die edge and the third lower-die edge such that the offcut having frame-shape is shorn and segmented between the second upper-die edges and the second lower-die edges. a lower die; and an upper die that is movable relative to the lower die, wherein: the lower die has a first lower-die edge extending along an outline shape of the sheet material, and a plurality of second lower-die edges disposed vertically below the first lower-die edge and each extending in a direction traversing an offcut of the sheet base material that is left behind after the sheet material is punched out; the upper die has a first upper-die edge that extends along the first lower-die edge, and a plurality of second upper-die edges that is provided so as to be protrusible to vertically below the second lower-die edges; the lower die has a support part that supports the sheet material punched out of the sheet base material, and an outer edge of an upper end surface of the support part includes the first lower-die edge; the upper die has a frame-shaped part provided so as to surround the first lower-die edge, and an inner edge of a lower end surface of the frame-shaped part includes the first upper-die edge; the lower die has a third lower-die edge extending so as to surround the first lower-die edge; the upper die has a third upper-die edge extending along the third lower-die edge; and wherein the lower die and the upper die are arranged such that in use, the sheet base material is shorn to punch out the sheet material between the first upper-die edge and the first lower-die edge; and the offcut is shorn and divided between the second upper-die edges and the second lower-die edges; wherein when protruded vertically downward, the second upper-die edges are arranged to be inserted into a clearance between the first lower-die edge and the third lower-die edge such that the offcut having frame-shape is shorn and segmented between the second upper-die edges and the second lower-die edges. the lower die has a first lower-die edge extending along an outline shape of the sheet material, and a plurality of second lower-die edges disposed vertically below the first lower-die edge and each extending in a direction traversing an offcut of the sheet base material that is left behind after the sheet material is punched out; the upper die has a first upper-die edge that extends along the first lower-die edge, and a plurality of second upper-die edges that is provided so as to be protrusible to vertically below the second lower-die edges; the lower die has a support part that supports the sheet material punched out of the sheet base material, and an outer edge of an upper end surface of the support part includes the first lower-die edge; the upper die has a frame-shaped part provided so as to surround the first lower-die edge, and an inner edge of a lower end surface of the frame-shaped part includes the first upper-die edge; the lower die has a third lower-die edge extending so as to surround the first lower-die edge; the upper die has a third upper-die edge extending along the third lower-die edge; and wherein the lower die and the upper die are arranged such that in use, the sheet base material is shorn to punch out the sheet material between the first upper-die edge and the first lower-die edge; and the offcut is shorn and divided between the second upper-die edges and the second lower-die edges; wherein when protruded vertically downward, the second upper-die edges are arranged to be inserted into a clearance between the first lower-die edge and the third lower-die edge such that the offcut having frame-shape is shorn and segmented between the second upper-die edges and the second lower-die edges.