A waterproofing/oilproofing agent composition which has excellent water and oil resistance. The composition comprises an aqueous medium and a fluorocopolymer comprising units of a monomer represented by (Z-Y)nX(wherein Z is C1-6 perfluoroalkyl, etc.; Y is alkylene, etc.; n is 1 or 2; and X is a polymerizable unsaturated group), units of a monomer represented by CH2=CR<1>-G-(R<2>O)q-R<3> (wherein R<1> is hydrogen, etc.; R<2> is C2-4 alkylene; q is an integer of 1 to 50; G is -COO(CH2)r- (wherein r is an integer of 0 to 4); and R<3> is hydrogen, etc.), and units of a monomer represented by CH2=CR<4>COO-Q-NR<5>R<6> (wherein R<4> is hydrogen, etc.; Q is C2-4 alkylene, etc.; and R<5> and R<6> each is C1-8 alkyl, etc.). |