To provide a punching die and a punch capable of reducing unnecessary parts except a blank part to be punched when a metallic plate is cup- drawn, and reducing the generation of ear when the blank is formed into a cylinder.

The punching section of a die and a punch is basically, a hexagon two side of which facing each other are substantially parallel to each other. Each corner part on the periphery of the hexagon is formed in an arc shape, and the ratio (R/2r) of the radius (R) of curvature of the arc to the diagonal length of the shape in which each corner part on the periphery of the hexagon is formed in the arc shape (the distance of between the corner parts after the corners are rounded: 2r) is set to 0.15-0.45.