Electronic card connectors for receiving and electrically connecting with at least one electronic card are described. The electronic card connector includes a base having a plurality through holes, a frame, and a plurality of terminals which are adapted to pass through the through holes. The frame is configured to be assembled with the base to form a receiving recess. At least one of the plurality of terminals may include a plurality of metal pins. When the at least one electronic card is inserted into the receiving recess, one of the plurality of metal pins is electrically connected to the other one of the plurality of metal pins via a sensor unit.