PURPOSE: To obtain a high-quality reproduced signal even under high density magnetic recording.

CONSTITUTION: This system is equipped with an oscillation element 6 for giving a physical oscillation of double the recording frequency to change a relative position of a magnetic head 1 and a magnetic recording medium 2, so as to increase magnetic flux passing into the magnetic head 1. By this method, since the magnetic flux passing through the head in a reverse magnetization area of a recording pattern is rapidly decreased, a reproduced output is made steep and moreover increased.