PROBLEM TO BE SOLVED: To provide a rosuvastatin calcium-containing tablet which is chemically stable during storage in a high humidity environment without lowering the dissolution property even if a polyvalent cationic inorganic salt stabilizer is not contained.SOLUTION: It was found that use of a certain additive in tablets containing rosuvastatin calcium prevents lactone formation and lowering of dissolution property during storage in a high humidity environment. The certain additive is a sugar alcohol (D-mannitol etc.) or a lowly substituted hydroxypropylcellulose (Example 1).SELECTED DRAWING: Figure 1