A cutting insert comprising: an insert body comprising a polygonal-shaped top surface including a corner section, and a first side and a second side each adjacent to the corner section, a polygonal-shaped bottom surface corresponding to the top surface, and side surfaces positioned between the top surface and the bottom surface; a cutting edge positioned at an intersection between the top surface and the side surfaces, the cutting edge comprising a corner cutting edge positioned at the corner section, a first cutting edge positioned on the first side, and a second cutting edge positioned on the second side; a rake face positioned along the cutting edge on the top surface, the rake face sloping downward away from the cutting edge; and a first raised part positioned inside the rake face on the top surface and rising upward; wherein the first raised part comprises a protruding section positioned so as to include a bisecting line of the corner section, protruding toward the corner cutting edge, and having a width in a direction orthogonal to the bisecting line that decreases toward the corner cutting edge when viewed from above; and the cutting insert further comprises a second raised part positioned on a tip side of the protruding section, extending toward the first cutting edge and the second cutting edge from the protruding section, and having a convex curved shape in which, when viewed from above, an outer peripheral edge on the corner section side forms a protuberance extending toward the corner section, characterised in that, when a reference plane is provided so as to intersect a central axis that connects a center of the top surface and a center of the bottom surface and to be positioned downward from the top surface, the second raised part has a height from the reference plane of both end portions that extend toward the first cutting edge and the second cutting edge that is greater than a height from the reference plane in a middle portion positioned on the bisecting line. an insert body comprising a polygonal-shaped top surface including a corner section, and a first side and a second side each adjacent to the corner section, a polygonal-shaped bottom surface corresponding to the top surface, and side surfaces positioned between the top surface and the bottom surface; a polygonal-shaped top surface including a corner section, and a first side and a second side each adjacent to the corner section, a polygonal-shaped bottom surface corresponding to the top surface, and side surfaces positioned between the top surface and the bottom surface; a cutting edge positioned at an intersection between the top surface and the side surfaces, the cutting edge comprising a corner cutting edge positioned at the corner section, a first cutting edge positioned on the first side, and a second cutting edge positioned on the second side; a corner cutting edge positioned at the corner section, a first cutting edge positioned on the first side, and a second cutting edge positioned on the second side; a rake face positioned along the cutting edge on the top surface, the rake face sloping downward away from the cutting edge; and a first raised part positioned inside the rake face on the top surface and rising upward; wherein the first raised part comprises a protruding section positioned so as to include a bisecting line of the corner section, protruding toward the corner cutting edge, and having a width in a direction orthogonal to the bisecting line that decreases toward the corner cutting edge when viewed from above; and the cutting insert further comprises a second raised part positioned on a tip side of the protruding section, extending toward the first cutting edge and the second cutting edge from the protruding section, and having a convex curved shape in which, when viewed from above, an outer peripheral edge on the corner section side forms a protuberance extending toward the corner section, characterised in that, when a reference plane is provided so as to intersect a central axis that connects a center of the top surface and a center of the bottom surface and to be positioned downward from the top surface, the second raised part has a height from the reference plane of both end portions that extend toward the first cutting edge and the second cutting edge that is greater than a height from the reference plane in a middle portion positioned on the bisecting line.