To provide a method and a die simultaneously forming and bending a work at a bending portion when bending a plate like work to a V shape.

When bending a plate like work by a male die 1 and a female die 3, that is a bending/forming method by which bending and forming are simultaneously executed by pressing a bending portion of a work into a forming recessed part 1C formed to the male die 1 with an elastic member 19 arranged to the female die 3, in a die device consisting of the male die 1 and the female die 3 for bending the plate like work, the forming recessed part 1C is formed to a bending part 1B of the male die 1, a die block 9 having a groove 7 for bending and an elastic member 19 to press the work into the forming recessed part 1C with moving relative to the die block 9 are arranged to the female die 3.