Patent ID: 8113746

Claim:
A cutting insert, comprising: an upper face; a lower face; a side face which is located between the upper face and the lower face and comprises at least one upper concave portion extending along a thickness direction up to the upper face; and a plurality of divided upper cutting edges which are located at an intersection of the upper face and the side face and are divided by the at least one upper concave portion, wherein each of the plurality of divided upper cutting edges comprises a first end located at one end and a second end located at the other end, and is inclined being closer to the lower face from the first end toward the second end when viewed from side, the plurality of divided upper cutting edges comprise a first divided upper cutting edge, and a second divided upper cutting edge adjacent to the second end of the first divided upper cutting edge through the at least one upper concave portion, when viewed from side, the first end of the second divided upper cutting edge is located above an intersection of an extension line extended from the first divided upper cutting edge toward the second divided upper cutting edge, and a line which passes through the first end of the second divided upper cutting edge and is parallel to the central axis of the cutting insert, and when viewed from side, the first end of the second divided upper cutting edge is located at the same position as the second end of the first divided upper cutting edge or is located below the second end of the first divided upper cutting edge.