Abstract: A female terminal fitting (10) is provided with a tubular main portion (30), into which a mating male tab (70) is inserted along an axial center A from the front. A resilient contact piece (80) extends back in the main portion (30) and has a free end slidable on an inner surface of the main portion (30). The inner surface of the main portion (30) includes a first slide surface (51) aligned for permitting displacement of the free end of the resilient contact piece (80) while maintaining a uniform distance to the axial center (A) of the main portion (30) and a second slide surface (52) for permitting displacement of the free end of the resilient contact piece (80) while increasing the distance to the axial center (A) of the main portion (30).