Disclosed is a microneedle coating composition comprising a Japanese encephalitis vaccine antigen, a basic amino acid, and an acid, wherein the mole number of the acid for one mole of the basic amino acid is larger than 1/(N+1) and less than 2, where N represents the valence of the acid.本發明揭示了一種微針頭塗覆用組成物,其係含有日本腦炎疫苗抗原、鹼性胺基酸及酸,並且在將酸的價數定為N時,相對於鹼性胺基酸1莫耳,酸的莫耳數超過1/(N+1)且未滿2。
