<p>An error rate estimation device includes: a decoding unit (11) for decoding a reception sequence of error correction codes and outputting an after-the-fact value; an after-the-fact value distribution measurement unit (12) for measuring the after-the-fact value distribution degree according to the number of times the after-the-fact value has exceeded a predetermined threshold value and the reception sequence information bit count; and an error ratio estimation unit (13) for estimating the error ratio after decoding according to the measured after-the-fact value distribution degree.</p>
