To provide a bar coating method and apparatus by which a planar coating film free from coating unevenness is obtained even in coating requiring remarkably high precision such as for an optical film or a magnet recoding medium.

In the bar coating method for applying a coating liquid on a travelling supporting body using a coating bar 28 rotated by a bar driving system 70 in which rotation drive power is transmitted to a bar driving shaft 76 through a belt 74 from a rotation drive source 72, the coating is carried out while avoiding the resonance caused by the vibration of the bar driving system 70 and the vibration due to the rotation of the coating bar 28 by controlling the characteristic frequency of the bar driving system 70.