The present invention provides an orally disintegrating tablet containing mitiglinide calcium hydrate. The tablet has reduced bitterness and quickly disintegrates in the mouth, while exhibiting rapid dissolution in the digestive tract. The bitterness-masked orally disintegrating tablet comprises: (a) mitiglinide calcium hydrate； (b) microcrystalline cellulose； (c) at least one masking agent selected from the group consisting of aminoalkyl methacrylate copolymer E, polyvinylacetal diethylaminoacetate, an ethyl acrylate-methyl methacrylate copolymer, and ethyl cellulose； (d) a sugar or a sugar alcohol； and (e) at least one selected from corn starch and partially pregelatinized starch.
