This grooving tool includes a cutting insert, a holder, and a coolant flow path. The holder includes an insert mounting seat, and jaw parts that are disposed on an upper side and a lower side of the insert mounting seat and fix the cutting insert. The jaw part forms a curved shape as viewed from a tool distal end side, and has a thickness that is decreased as a distance from the insert mounting seat is increased. The coolant flow path includes a jaw part flow path extending through an inside of the jaw part, and the jaw part flow path includes a guide flow path section that has a vertically elongated shape with a dimension a in the vertical direction larger than a dimension b in the tool width direction in a channel cross section, and an ejection flow path section that has a laterally elongated shape.