An electrical connector includes an insulative housing and a first and second contact received in the housing. The housing defines a mating face, a rear face opposite to the mating face, and a supporting face disposed between the mating and rear faces. A mating cavity recesses from the mating face towards the supporting face and disposed therebetween, and a receiving groove recesses forwards from the rear face and runs through the supporting face to communicate with the mating cavity. The first contact is retained in the receiving groove with an elastic contacting porting running through the supporting face and projecting into the mating cavity. The second contact is retained in the housing and includes two opposite second contacting portions disposed at two opposite sides of the elastic contacting portion of the first contact. A mating connector can be rotated to disengage from the electrical connector.