PROBLEM TO BE SOLVED: To provide an orally quickly disintegrating solid formulation which can be produced by simple processes using a simple production apparatus and which has a quickly disintegrating property within an oral cavity and a moderate moldability for practical use, to provide a method for producing same, and to provide a composition used as a component of the orally quickly disintegrating tablet.SOLUTION: A composition for an orally quickly disintegrating solid formulation comprises (a) a copolymer obtained by copolymerizing polyvinyl alcohol and a polymerizable vinyl monomer at a mass ratio of 6:4-9:1, and (b) tannic acid. The orally quickly disintegrating solid formulation contains this composition.
