A supporting plate 4 is uprighted from a bottom wall 5 of an electric contact portion 2 of a female terminal 1. Both ends 4a of the supporting plate protrude horizontally over a height equal to the height of the supporting plate and are engaged in engagement grooves formed on inner side walls 6 of the electric contact portion 2. The entire width of the supporting plate is larger than the inner width of said bottom wall. Such a settling structure for the terminal surely prevents excess warping of the electric contact potion of the terminal.