An information recording/reproducing device includes a transfer control section for carrying out input/output of transfer data, a recording medium control section for carrying out writing to/reading from a recording medium, a file management section for managing a recorded file, and a CPU for carrying out control of each constituent element. The recording medium control section includes a page counter for counting the number of pages at the time of data transfer, and address register group for designating addresses, a control circuit which includes a pointer for selecting one effective address register and a control register for designating the type of control with respect to the recording medium and is adapted for transmitting/receiving a control signal to/from the transfer control section, the CPU and the recording medium, and a recording medium selection circuit for selecting recording medium pieces. Thus, it is possible to carry out high-speed data transfer by parallel control of the recording medium pieces, restrain overhead processing in data transfer, and carry out data transfer of higher versatility.