PROBLEM TO BE SOLVED: To provide an orally disintegrating tablet which (1) can be readily produced with common equipment without requiring specific pharmaceutical techniques, (2) has proper strength which does not damage in a distribution process, (3) has rapid disintegrating property in oral cavity, and (4) has excellent properties such as having with a good feel of ingestion which greatly alleviates bitter taste, graininess, and the like.SOLUTION: An orally disintegrating tablet contains (1) D-mannitol, (2) an active ingredient, (3) one or more kinds of disintegrants selected from the group consisting of crospovidone and carmellose, (4) a sucrose fatty acid ester, (5) a binder, and (6) starches. The content of D-mannitol in the formulation is 50% by weight or more. The tablet disintegrates within 30 seconds in oral cavity, and its absolute hardness is 2.5 N/mm.【課題】(1)特殊な製剤技術を必要とせず一般的な設備で容易に製造可能である、(2)流通過程で損傷しない適度な強度を有する、(3)口腔内において速やかな崩壊性を有する、(4)苦味やざらつき感等を大きく軽減した良好な服用感を併せ持つ等の優れた特性を有する口腔内崩壊錠を提供すること。【解決手段】(1)D-マンニトール、(2)活性成分、(3)クロスポビドン及びカルメロースからなる群より選ばれる1種以上の崩壊剤、(4)ショ糖脂肪酸エステル、(5)結合剤、並びに(6)デンプンを含有し、D-マンニトールの製剤中の含有量が50重量%以上であり、口腔内で30秒以内に崩壊し、かつ絶対硬度が2.5N/mm2である、口腔内崩壊錠。【選択図】なし