A connector assembly includes a first electrical connector, a second electrical connector detachably plugged to the first electrical connector and an elastic engaging component including a mount part, a bent part, an arm part, an engaging part and a press part. The mount part includes an insertion plate configured to be inserted into the retaining groove and a movable plate connected to the insertion plate. The arm part is connected to the mount part via the bent part. The arm part and the mount part are located at the same side of the bent part. The engaging part is located at the arm part and is movable along with the arm part. the engaging part is configured to be engageable with the second electrical connector. The press part is connected to the arm part, and the arm part is movable by pushing the press part.