PURPOSE: To improve the inspection efficiency of memory cards to be tested, to prolong the time interval of attaching/detaching operations, to facilitate the introduction of a robot device, and to execute an unmanned inspection by inspecting plural sheets of the memory cards to be tested continuously.

CONSTITUTION: Address information 23 of an address generating circuit 4 and write data 24 of a data generating circuit 5 are commonly supplied to the N- sheets of the cards to be tested. By selecting information 21 from a selecting circuit 1, an enable signal 22 from a control signal generating circuit 2 is distributed at a distributing circuit 3, and then, successively supplied to the N-sheets of the memory cards to be tested. Only the output of presently-enabled cards 9 is selected at a selecting circuit 6 and compared with the expectation data 25 at a comparing circuit 7. This compared result is displayed at a displaying circuit 8 as an inspection result.