A connector for receiving a memory card employs a power supply switching mechanism, a memory card ejecting mechanism and a memory card lock mechanism. A connector body on which a plurality of connecting terminals to be connected with the memory card is mounted has a one piece structure with a pair of guide arms for slidably guiding the memory card. One of the guide arms is formed with a groove, where power supply terminal electrodes and a switching member are attached. An actuating member with a locking member and an actuator with an ejector member are also attached to the connector body. Operation of the actuating member is accompanied with the movements of the locking member, the switching member and the actuator. Movement of the locking member causes the memory card to lock, the switching member switches on the power supply, and the actuator serves to eject a card. Thus, the power supply switching mechanism, the memory card ejecting mechanism and the memory card lock mechanism are linked to one another so as to perform their functions in accordance with the operation of the actuating member. The connector increases efficiency in assembling electronic appliances and enables an easy operation to load and unload the memory card.