A front portion of a terminal is provided with a flattened-rectangular tube-shaped box part for receiving a male tab terminal so as to establish contact and conduction thereto. Then, lock holes are provided at three parts of the center in the width direction of the box part and vicinities of both ends in the width direction. A lance for locking the terminal is formed in the shape of one plate. Three beaks protrude therefrom for engaging with the lock holes of the terminal. Further, the lance is provided with slits for improving elasticity and a linkage part for linking the three beaks together.