An electronic apparatus is provided at one side with an adapting plate, on at least one side surface of which there is provided connecting lines, and a memory-card plug adapter is detachably connected to the apparatus through engagement of a socket provided at a front end of the adapter with the adapting plate on the apparatus. Elastic contact terminals are provided in the socket to electrically connect to the connecting lines on the adapting plate. The apparatus is adapted to plug in any type of memory-card socket provided on a computer through detachable engagement of the adapting plate on the apparatus with one memory-card plug adapter that corresponds to the memory-card socket on the computer.