A thin-film splash guard for use with dental cuspidors is described. The splash guard includes a thin-film sheet, a pair of slots, and an adhesive. The thin-film sheet is composed of a flexible, flaccid material with front and back surfaces which is sufficiently stiff when conformed to the shape of a dental cuspidor so as to extend above the side wall of the cuspidor. The slots are disposed from one edge of and along the thin-film sheet so as to generally define a center region and a pair of side regions. The adhesive is disposed along the front surface within each side region and/or along the back surface within the center region. The thin-film splash guard is readily conformable to the shape and size of a cuspidor, easily attachable to the cuspidor in a removable fashion, and disposable.