A treatment for paper, containing (A) a fluorine-containing polymer comprising repeating units derived from a fluorine-containing monomer (a) represented by the general formula (I): CH.sub.2.dbd.C(--X)--C(.dbd.O)--Y--(CH.sub.2).sub.m-Z-(CH.sub.2).sub.n--R- f (I) wherein X is hydrogen, methyl, fluoro, chloro, CFX.sup.1X.sup.2 (wherein X.sup.1 and X.sup.2 are each hydrogen, fluoro, or chloro), or the like; Y is --O-- or --NH--; Z is --S--, --SO--, or --SO.sub.2--; Rf is fluoroalkyl having 1 to 6 carbon atoms; m is 1 to 10; and n is 0 to 10.