The present invention provides a kind of oral solid composition of bitter taste for covering the drug in bitter taste. The oral solid preparation is by will include (A) in being granulated in the presence of the drug of bitter taste and the composition what water of (B) hydrophilic macromolecule, and then the universe is dry becomes 7.5 mass % or less to amount of moisture and obtain.本發明提供一種遮蔽呈苦味的藥物的苦味之經口固形組合物。該經口固形製劑,係藉由將包含(A)呈苦味的藥物及(B)親水性高分子之組合物於水之存在下進行造粒,繼而乾燥至水分量成為7.5質量%以下而獲得。