Abstract: There is provided a tracking control apparatus for controlling the position of a recording and reproducing head with respect to a recording track by detecting a plurality of kinds of servo marks disposed at fixed intervals from the center line of a recording track on a magnetic disk. The present apparatus comprises a position error coefficient computation device responsive to position error values in a plurality of positions of the recording and reproducing head on the track and position signals at those times to correct a coefficient to be used for calculating a position error, and an actuator responsive to an output signal of the computation device. Thereby, it is possible to obtain an accurate position error signal which depends upon neither the track pitch nor the core width of the recording and reproducing head.