A posture adjustment method of a magnetic head is provided. A magnetic head initial position adjustment apparatus measures an initial position of the magnetic head and writes the initial position into an adjustment position information shared apparatus. A magnetic head posture adjustment apparatus reads from the adjustment position information shared apparatus, and information of an adjustment amount given to the magnetic head when the magnetic head is moved and adjusted to a final position is written in the adjustment position information shared apparatus. An adjustment position as a current position of the magnetic head is calculated using the initial position information and the adjustment amount information.