An electric connector comprises insulating lingual plates, conductive terminals arranged on the lingual plates and a metal shell wrapping the lingual plates. The metal shell possesses a butting hole used for accommodating a butting connector, and the lingual plates comprise a first lingual plate and a second lingual plate which can move front and back, and the butting hole is divided into an upper butting hole for accommodating the first lingual plate and a lower butting hole for accommodating the second lingual plate. The conductive terminals comprise a first terminal set arranged on the first lingual plate and a second terminal set arranged on the second lingual plate, and the first and second terminal sets comprise contacting parts arranged on the first and second lingual plates respectively. The electric connector possesses a first state and a second state, when the electric connector is in the first state, the second lingual plate is located behind the lower butting hole, and the contacting parts of the first terminal set are exposed at the lower butting hole; when the electric connector is in the second state, the first lingual plate is located behind the upper butting hole, and the contacting parts of the second terminal set are exposed at the upper butting hole, thereby being convenient for the butting of the electric connector and the butting connector.