An audio jack connector includes a dielectric housing, a signal terminal and a detection terminal. The dielectric housing defines a receiving trough at a top surface thereof. An opening is defined in the receiving trough with a notch communicated with a rear end thereof. A location slot is defined at a side of the dielectric housing to intersect the notch. The detection terminal is received in the location slot and has an inclined portion inclined towards the notch. The inclined portion has a protuberance provided on an outer surface thereof. The signal terminal is received in the receiving trough and has a concaved portion projected into the insertion hole from the opening and a cantilever arm located to the notch. A free end of the cantilever arm is inclined downward to form a pressing portion for pressing against the protuberance of the detection terminal.