A barking machine has a container for processing logs formed with openings each extended lengthwise of the container, a transfer guide plate disposed between the openings, multiple notches formed in the openings, lower and side cylindrical rotators each having protruding barking blades on its outer periphery which pass through the notches, and a supporting member for retaining the transfer guide plate. In such a construction, the rotors are partially inserted into the openings, respectively. The lower rotor rotates so that its barking blades move toward the side opening, and the side rotor rotates so that its blades move upwardly. With this arrangement, it is possible to prevent the logs from being blocked between the rotators or falling from therebetween, and to provide a strengthened transfer guide plate with no deformation, thereby enhancing the circulating of logs in the container and the barking operation.