A terminal connector includes a housing, at least one conductor-retaining terminal each including an insertion passage for receiving the conductor of one respective electrical wire inserted into the housing and two springy suspension arms bilaterally disposed near a rear side and respectively curving toward the inside of the insertion passage for clamping the conductor, and at least one slide block each including a sliding cover panel coupled to the housing two beveled pushing surfaces located at a bottom side of the sliding cover panel and movable with the sliding cover panel between a first position where the pushing surfaces are kept away from the springy suspension arms for allowing the springy suspension arms to clamp on the conductor and a second position where the pushing surfaces are engaged into the gap between the springy suspension arms to release the conductor from the constraint of the springy suspension arms.