Abstract: Provided is a female terminal fitting capable of improving the durability of an elastic contact piece. A female terminal fitting (10) includes a tubular main body part (20) and an elastic contact piece (40) extending, inside the main body part (20), from a support point part (41) to a free end part (42) and contacting a partner-side male tab (120) inserted in the main body part (20). The free end part (42) side of the elastic contact piece (40) displaces in the plate thickness direction of the elastic contact piece (40). The main body part (20) has a first regulating part (31) and a second regulating part (32) that come in contact with the elastic contact piece (40) and regulate a displacement range of the free end part (42) side to less than or equal to the plate thickness of the elastic contact piece (40).

Abstract: A lock arm is formed with a first receiving surface and two second receiving surfaces, and the second receiving surfaces are disposed to sandwich the first receiving surface from both sides in a width direction intersecting a resilient displacing direction of the lock arm. A resilient arm of a detector includes a first butting portion configured to butt against the first receiving surface, a separation restricting portion projecting farther forward than the first butting portion from a position closer to a housing body than the first butting portion, and two second butting portions projecting from both widthwise outer side surfaces of the resilient arm. The second butting portions restrict a movement of the detecting member at an initial position to a detection position by butting against the second receiving surfaces.

Abstract: A lock arm is formed with a first receiving surface and two second receiving surfaces, and the second receiving surfaces are disposed to sandwich the first receiving surface from both sides in a width direction intersecting a resilient displacing direction of the lock arm. A resilient arm of a detector includes a first butting portion configured to butt against the first receiving surface, a separation restricting portion projecting farther forward than the first butting portion from a position closer to a housing body than the first butting portion, and two second butting portions projecting from both widthwise outer side surfaces of the resilient arm. The second butting portions restrict a movement of the detecting member at an initial position to a detection position by butting against the second receiving surfaces.