Disclosed is an orally disintegrating tablet in which the optical stability of a medicinal agent that is contained in the tablet and is unstable to the irradiation with light is improved. Specifically disclosed is an orally disintegrating tablet comprising an inner core and an outer layer that covers the surface of the inner core, wherein the inner core contains a medicinal agent that is unstable to the irradiation with light and the outer layer contains a light-absorbing substance such as Red No. 2, Red No. 3, Yellow No. 4, Yellow No. 5, Blue No. 1, Red No. 3 aluminum lake, Yellow No. 4 aluminum lake, Yellow No. 5 aluminum lake, Blue No. 1 aluminum lake, Blue No. 2 aluminum lake, iron sesquioxide, iron sesquioxide yellow, black iron oxide, carmine and sodium copper chlorophyllin.
