An aqueous coating composition comprising: (i) a polycarbonate/polyoxyethylene block copolymer, comprising a polycarbonate structure represented by the following general formula and a polyoxyethylene structure represented by the following general formula, wherein the proportion of the hydroxyl groups in the total amount of both terminal groups of the copolymer, measured according to the method disclosed in the description, is 90%by mole or more: -(R-O-CO-O) m - wherein R may be the same or different and represents a divalent aliphatic hydrocarbon group having 3 to 9 carbon atoms and optionally having a branched chain, or a divalent alicyclic hydrocarbon group having 6 to 8 carbon atoms, and m represents a number of 2 to 50; and -(CH 2 -CH 2 -O) n - wherein n represents a number of 13 to 46, and (ii) a polycarbonate diol represented by general formula: HO-(R-O-CO-O) p -R-OH wherein R may be the same or different and represents a divalent aliphatic hydrocarbon group having 3 to 9 carbon atoms and optionally having a branched chain, or a divalent alicyclic hydrocarbon group having 6 to 8 carbon atoms, and p represents a number of 2 to 50; wherein the mass ratio of the total amount of the polycarbonate structure represented by the general formula and the polycarbonate structure represented by -(R-O-CO-O) p - in the general formula to the polyoxyethylene structure represented by the general formula (polycarbonate structure/polyoxyethylene structure), measured according to the method disclosed in the description, is 50/50 to 95/5 and wherein R in the general formula has the same meaning as R in the general formula, and p in the general formula has the same meaning as m in the general formula. (i) a polycarbonate/polyoxyethylene block copolymer, comprising a polycarbonate structure represented by the following general formula and a polyoxyethylene structure represented by the following general formula, wherein the proportion of the hydroxyl groups in the total amount of both terminal groups of the copolymer, measured according to the method disclosed in the description, is 90%by mole or more: -(R-O-CO-O) m - wherein R may be the same or different and represents a divalent aliphatic hydrocarbon group having 3 to 9 carbon atoms and optionally having a branched chain, or a divalent alicyclic hydrocarbon group having 6 to 8 carbon atoms, and m represents a number of 2 to 50; and -(CH 2 -CH 2 -O) n - wherein n represents a number of 13 to 46, and (ii) a polycarbonate diol represented by general formula: HO-(R-O-CO-O) p -R-OH wherein R may be the same or different and represents a divalent aliphatic hydrocarbon group having 3 to 9 carbon atoms and optionally having a branched chain, or a divalent alicyclic hydrocarbon group having 6 to 8 carbon atoms, and p represents a number of 2 to 50; wherein the mass ratio of the total amount of the polycarbonate structure represented by the general formula and the polycarbonate structure represented by -(R-O-CO-O) p - in the general formula to the polyoxyethylene structure represented by the general formula (polycarbonate structure/polyoxyethylene structure), measured according to the method disclosed in the description, is 50/50 to 95/5 and wherein R in the general formula has the same meaning as R in the general formula, and p in the general formula has the same meaning as m in the general formula.