A mapping algorithm for efficient access to a flash memory, wherein block state information that is changed through logical operations required by a processor is written in the flash memory according to a predetermined state transition algorithm and the changed information is referred to upon read/write operations. A mapping control apparatus for a flash memory according to the present invention includes a flash memory having regions divided on a block basis and containing block state information indicating the state of each block, each block including a predetermined number of sectors; and a processor for determining a sector on which a predetermined logical operation is to be performed based on the block state information and updating the block state information according to a predetermined state transition algorithm, when the logical operation is required for the flash memory.