PURPOSE: To positively clean mortar, etc., stuck on the outer surface of a mould, particularly on recessions by differentiating time diameters of pluralitly of strands and by forming irregularities on the surface.

CONSTITUTION: A core wire 26 having high tensile strength and a plurality of strands 27-29 formed by twisting around the core wire are provided. The diameters of a plurality the strands are differentiated to form irregularities on the surface of a cleaning rope. As the result, the projections on the surface of the cleaning rope 30 completely follow and touch the recessions on the outer surface of the mould to positively clean mortar, etc., stuck on the outer surface of the mould.