Provided is a composition for a coating liquid for microneedles which is optimal for when coating microneedles with a drug. This coating liquid for microneedles is an aqueous solution which has, as essential components of a base thereof, a water-soluble polysaccharide, a monosaccharide and/or a disaccharide, and a surfactant, and is characterized in that: the proportion of the water-soluble polysaccharide in the base is 2-60 mass%； and the hardness of a coating substance after drying is at least 10 N. A water-soluble polyhydric alcohol may also be included. It is preferable that, in the base, the proportion of the monosaccharide and/or the disaccharide be 30-95 mass%, the proportion of the surfactant be 0.05-5 mass%, and the proportion of the water-soluble polyhydric alcohol be not more than 10 mass%. Hydroxypropyl cellulose, hyaluronic acid, or carboxymethyl cellulose is preferable as the water-soluble polysaccharide.
