The present invention provides a orally disintegrating tablet and a production process thereof having excellent industrial productivity. Wherein the orally disintegrating tablet rapidly disintegrates in the oral cavity or in water and has a good texture and a sufficient hardness required for production, transportation or using, and a high storage stability.A orally disintegrating tablet comprises: an active ingredient, a crystalline cellulose having a bulk density of 0.23g/cm3 or less (preferably 0.10 g/cm3 to 0.23 g/cm3), a sugar alcohol, and a gelatinized starch.茲提供一種含於口中時或者放入水中時可迅速崩壞、口感良好,在一般的製造、輸送、使用之際可保持充分的硬度,且保存穩定性優異的口腔內崩壞錠及其工業生產性優良的製造方法。解決手段係一種口腔內崩壞錠,其含有藥物、容積密度為0.23g/cm3以下(較佳為0.10g/cm3以上0.23g/cm3以下)之結晶纖維素、糖醇及α化澱粉。
