The device for marking the beveled cutting place of a cylindrical object contains a frame element, which is placed during marking around the cylindrical object, as well as a longitudinal marking element designed to interact with the flat supporting surface of the specified frame element. The frame element is made of at least three longitudinal elements, each of which on one of the end sections is equipped with a hinged slider. Along the length of each of the longitudinal elements, a through groove is made to place in it with the possibility of fixing the adjacent longitudinal element in the desired position of the slider.
