There are a semiconductor device including: a plurality of memory blocks including a plurality of pages; peripheral circuits configured to perform a least significant bit read operation and a most significant bit read operation of a selected page included in a selected block; and a control circuit including a least significant bit read-retry table and a most significant bit read-retry table which have a plurality of indexes, and configured to control the peripheral circuits to store an index used when error correction is possible among the least significant bit read-retry table in the least significant bit read operation and perform the most significant bit read operation by first selecting the stored index among the most significant bit read-retry table.