A cutting insert includes an end cutting edge located along an intersection of an upper surface and a front clearance surface, and a pair of side cutting edges respectively located along intersections of the upper surface and a pair of side clearance surfaces. The upper surface includes an end rake surface that is continuous with and inclined downward as departing from the end cutting edge, a pair of major protrusions that are less apart from each other as departing from the end cutting edge in a top view, and a pair of minor protrusions that are respectively located close to their adjacent side clearance surface of the pair of side clearance surfaces with respect to the pair of major protrusions. The pair of minor protrusions are located further apart from the end cutting edge than an end portion of each of the pair of major protrusions.