A method for producing a microneedle device having a coating on the microneedles comprises a step A of drying a precursor composition containing a biologically active substance and a first solvent to obtain -a freeze-dried composition, a step B of mixing the freeze-dried composition with a second solvent to obtain a coating composition, and a step C of applying the coating composition to the microneedles and drying the same, wherein the precursor composition further contains a thickener, or a thickener is added when the freeze-dried composition and the second solvent are mixed.
