The goal is to enhance the productivity by reducing the cost of a die. A method for selectively forming a female terminal (30) and a male terminal (40), each terminal having a square tubular box portion (31, 41) in its front and a wire crimping portion (38, 39, 48, 49) in its rear, from blanks (20) punched into a common shape is provided. In a step of punching the blank, a front projection (22) which becomes a spring piece (32) when the female terminal is produced and becomes a male tab (42) when the male terminal is produced is projected from the front end of a strip-like base plate (21) constituting a bottom plate of the square tubular box portion, and a blank in which right and left projections (28, 29) constituting the wire crimping portions are projected is formed in the rear of the base plate. In the subsequent pressing step, the female terminal and the male terminal are selectively formed in response to whether the front projection (22) is folded backward or left as it is, while the blank is made common for the box portions.