A cutting insert, comprising: an upper surface; a side surface; and a cutting edge located at an intersection region of the upper surface and the side surface, wherein the upper surface comprises a rake surface continuous with the cutting edge, and a rising surface inclined and lying at a higher position as going inward from the rake surface, and the rake surface comprises a pair of first raised parts (4, 4A, 4B) respectively extending inward from near both ends of the cutting edge in a top view, and a second raised part extending from one of the pair of first raised parts to the other, characterised in that, both W1 and W2 in each of the pair of first raised parts are smaller at a side of the second raised part than a side of the cutting edge, where W1 is a distance between the ridge portion of one of the first raised parts and the other ridge portion, and W2 is a distance between an intersection region of the one first raised part and a bottom part of the rake surface, and an intersection region of the other first raised part and the bottom part of the rake surface, and wherein both the W1 and W2 are larger at a side of the rising surface than the side of the second raised part. an upper surface; a side surface; and a cutting edge located at an intersection region of the upper surface and the side surface, wherein the upper surface comprises a rake surface continuous with the cutting edge, and a rising surface inclined and lying at a higher position as going inward from the rake surface, and a rake surface continuous with the cutting edge, and a rising surface inclined and lying at a higher position as going inward from the rake surface, and the rake surface comprises a pair of first raised parts (4, 4A, 4B) respectively extending inward from near both ends of the cutting edge in a top view, and a second raised part extending from one of the pair of first raised parts to the other, characterised in that, both W1 and W2 in each of the pair of first raised parts are smaller at a side of the second raised part than a side of the cutting edge, where W1 is a distance between the ridge portion of one of the first raised parts and the other ridge portion, and W2 is a distance between an intersection region of the one first raised part and a bottom part of the rake surface, and an intersection region of the other first raised part and the bottom part of the rake surface, and wherein both the W1 and W2 are larger at a side of the rising surface than the side of the second raised part. a pair of first raised parts (4, 4A, 4B) respectively extending inward from near both ends of the cutting edge in a top view, and a second raised part extending from one of the pair of first raised parts to the other, characterised in that, both W1 and W2 in each of the pair of first raised parts are smaller at a side of the second raised part than a side of the cutting edge, where W1 is a distance between the ridge portion of one of the first raised parts and the other ridge portion, and W2 is a distance between an intersection region of the one first raised part and a bottom part of the rake surface, and an intersection region of the other first raised part and the bottom part of the rake surface, and wherein both the W1 and W2 are larger at a side of the rising surface than the side of the second raised part.