A bending method of bending a plate-shaped workpiece (W), comprising: with use of a die mountable on a lower table of a press brake and including a V-groove including a first groove wall surface and a second groove wall surface at an upper part thereof, and a punch mountable on an upper table of the press brake and including, at a workpiece pressing portion , a first surface , a second surface and a distal end , the first surface in a state of being mounted on the upper table being parallel to the first groove wall surface of the die in a state of being mounted on the lower table , the distal end is provided with a tip , whose cross-sectional shape of a cross section perpendicular to the lateral direction is an arc shape, at a lower end thereof and neighboring planar portions , and the planar portions are continuous to the first surface and the second surface , wherein the planar portions are opposed to and parallel to the first groove wall surface and the second groove wall surface in a state where the punch is advanced to the V-groove ,placing the plate-shaped workpiece (W) on the upper part of the die mounted on the lower table of the press brake ; pressing the plate-shaped workpiece (W) by the workpiece pressing portion of the punch mounted on the upper table of the press brake so as to bend the plate-shaped workpiece (W) in a state of being sandwiched between the first groove wall surface of the V-groove and the first surface of the punch , characterized in that an angle ( θ 2) formed between the second surface and a perpendicular plane (CP) being different from an angle ( θ v/2) formed between the second groove wall surface and the perpendicular plane (CP). with use of a die mountable on a lower table of a press brake and including a V-groove including a first groove wall surface and a second groove wall surface at an upper part thereof, and a punch mountable on an upper table of the press brake and including, at a workpiece pressing portion , a first surface , a second surface and a distal end , the first surface in a state of being mounted on the upper table being parallel to the first groove wall surface of the die in a state of being mounted on the lower table , the distal end is provided with a tip , whose cross-sectional shape of a cross section perpendicular to the lateral direction is an arc shape, at a lower end thereof and neighboring planar portions , and the planar portions are continuous to the first surface and the second surface , wherein the planar portions are opposed to and parallel to the first groove wall surface and the second groove wall surface in a state where the punch is advanced to the V-groove ,placing the plate-shaped workpiece (W) on the upper part of the die mounted on the lower table of the press brake ; pressing the plate-shaped workpiece (W) by the workpiece pressing portion of the punch mounted on the upper table of the press brake so as to bend the plate-shaped workpiece (W) in a state of being sandwiched between the first groove wall surface of the V-groove and the first surface of the punch , characterized in that an angle ( θ 2) formed between the second surface and a perpendicular plane (CP) being different from an angle ( θ v/2) formed between the second groove wall surface and the perpendicular plane (CP). <EOS>