To provide a method and device to remove a used elastomer cover from a roller economically, safely, with gentle effect for environment, and simply and quickly.

A rotatary machining head 4 having a plurality of machining tools fitted in an insert holder capable of being indexed is approached from one end of a cover 2 of a roller to near its core 1, and the head 4 is moved to the other end of the cover 2 along the roller in rotation. The peripheral linear speed of the tool should be 15 to 70m/sec, preferably between 40 and 50m/sec, and the tool should have a ring shape in case the elastomer has a Shore A hardness of approx. 90 or less.