A semiconductor recording device includes: flash memories including a plurality of physical blocks each including a plurality of pages; an external interface unit which receives data to be recorded on the flash memories; a first ECC generation unit which generates a first ECC code by adding parity data to the data; a data writing unit which records the data based on the first ECC code into the pages in the flash memories; and a page shuffling unit which controls assignment of a symbol of the first ECC code to the pages, and the page shuffling unit controls the assignment of the symbol of the first ECC code such that the symbol of the first ECC code is assigned to pages having at least two page numbers in the physical blocks included in a group.