There is provided a method for producing a rope member, provided with a rope of a bundle of synthetic fibers and a clamping member fixed to the rope and forming a portion with which the rope is to be connected or fastened to an external member, wherein a filler having permeability to the rope and containing a liquid and particles of an inorganic material dispersed in the liquid is made to permeate into a part of the rope, and the clamping member is fixed to the rope by installing the clamping member to cover the part of the rope permeated with the filler and by tightening the clamping member. The liquid is evaporated and only the inorganic material particles remain between the fibers of the rope. The clamping member is prevented from slippage even when a high load is applied to the synthetic fiber rope having high tensile force.