CUTTING INSERT AND CUTTING TOOL INCLUDING SAME

A cutting insert (10) includes an upper surface (17), a lower surface (19), a screw hole (H) having an axis (AX1) penetrating from the upper surface (17) to the lower surface (19), a peripheral side surface (15), and a major cutting edge (21), a wiper edge (24), and an inner edge (23) formed in an intersecting region between the upper surface (17) and the peripheral side surface (15). In a side view (fig. 4B) in which the peripheral side surface (15) on which the inner edge (23) is formed is seen from a direction perpendicular to the axis (AX1), the inner edge (23) includes a recessed part (23C) recessed toward the lower surface (19), a length (DL) of the inner edge (23L) on the one side of the recessed part (23C) remote from the wiper edge (24) in the side view is longer than a length (DR) of the inner edge (23R) on the other side of the recessed part (23C), a lowest point of the inner edge (23) is at a position lower than a flat part (17A) of the upper surface (17), and at least a part of the inner edge (23L) on the one side is at a position higher than the flat part (17A) of the upper surface (17). A cutting edge angle (ϕ23L, fig. 3) of the inner edge (23L) on the one side of the recessed part (23C) is larger than a half of a cutting edge angle (ϕ23R, fig. 3) of the inner edge (23R) on the other side of the recessed part (23C).