A debarking machine is provided with a plurality of rotors disposed in parallel, and a gap between the rotors is blocked by a comb-tooth shape partition plate. The debarking machine is further provided with a log accommodating body, rotors rotatively mounted inside the log accommodating body and provided with debarking plates, a comb-tooth shape partition plate base disposed at a space between the rotors, a comb-tooth shape partition plate detachably mounted on the comb-tooth shape partition plate base, and a fixer for fastening the comb-tooth shape partition plate to the comb-tooth shape partition plate base. The comb-tooth shape partition plate is composed of partition plate elements divided along the axial directions the rotors, and each partition plate element is detachable separately. Thus the comb-tooth shape partition plates can be rebuilt and replaced easily.