PROBLEM TO BE SOLVED: To provide a substrate having a surface layer excellent in water and oil repellency, antifouling property, and abrasion resistance and a method for producing the substrate.SOLUTION: There is used a fluorine-containing ether composition which comprises: a fluorine-containing ether compound (A1) in which a main chain composed of a poly(oxyperfluoroalkylene)chain and a hydrolyzable silyl group positioned at least one terminal of the main chain are linked by a linking group having an amide bond or an urethane bond and the number average molecular weight per one hydrolyzable silyl group is 2000 or more; and a medium (B) which contains at least a fluorine-containing organic solvent and in which the volume average value of a polarity term (dP) of a Hansen solubility parameter of the contained solvent is 2 to 6 and the volume average value of the hydrogen bond term (dH) is 4 to 12.
