A female terminal, into which a male terminal is inserted and connected, is formed in a shape of a substantially square tube. Respective one portions, in an axial direction and between corner portions, of a ceiling wall, a floor wall, and a pair of left and right side walls, which are four wall portions, are plate spring portions which contact the male terminal while elastically deforming independently of one another. Because the wall portions themselves structure the plate spring portions, there is no need to provide a plate spring within a tube wall, and the female terminal can be made compact. Further, contact pressure is ensured because the respective plate spring portions contact the male terminal from different directions.