A magneto-optical disk which reproduces information with an optical pickup
head which uses an electromagnetic force as the driving force is
provided. Other areas than at least the recording track are magnetized
uniformly in a direction of canceling the influence of external magnetic
field applied by the optical pickup head or a recording pattern having a
frequency higher than modulation transfer function (MTF) of the optical
pickup head is recorded to the other areas than at least the recording
track. Read signals SP12 and SP14 from the magneto-optical disk are low
in bit error rate.