The present invention relates to a filler material for a floor, comprising a natural base material and a mixture containing loess and a resin in powder or pellet form, as well as to a method for producing the filler material. The filler material uses the natural base material and is thus environmentally-friendly and not harmful to the human body. The resin emulsion of the filler material prevents the natural base material from generating dust, thus preventing dust from entering the human body via the respiratory organs of the human body. Further, the filler material of the present invention can be easily produced through a simple process. Therefore, mass production of the filler material can be accomplished even without employing experts.