To provide a bending device 1 with which a highly precise bending shape is secured, which is compact and with which working is performed at low cost by finishing bending work and high pressure working which is nearly vertical to a bent part integrally and only at one step without adding a drive source nor processes, and suppressing springback.

A penetrating punch 29 is arranged slantly on a punch 12 having a bending punch 31, one end side forms a high pressure punch 35 while being matched with the arranging position of a bending punch 31, and the other end side is brought into contact with a cam 13 which is locked to the high pressure spring 14 energizing in the pressurizing direction. The cam 13 has a wedge-shaped contact cam face and also arranged with an initial interval D to the punch 12 in the pressurizing direction. By lowering the punch 12, first, a workpiece W is bent with the bending punch 31 and, next, when the punch 12 reaches the bottom dead center, the initial interval D is reduced and the high pressure spring 14 is compressed. Energizing force is transmitted to the high pressure punch 35 via the surface of the contact cam face and the high pressure working of the bending part is performed nearly vertically.