A smart card holding member in this exemplary embodiment includes a main member, a connection member, and two resisting members. The connection member is connected to one end of the main member and bends toward the main member. The resisting members bend from opposite sides of the main member and each resisting member includes a locking section for fastening a battery in position. The resisting members are respectively connected to opposite sides of the main member to form an accommodating space for receiving a smart card therein. One part of the smart card is exposed out from the main member to be removed. A portable electronic device employing the smart card holding member is also described.