THE PRESENT INVENTION PROVIDES A SOLID PREPARATION CONTAINING COMPOUND (I) [COMPOUND (I) IS AS DEFINED IN THE SPECIFICATION] OR A SALT THEREOF, AND METFORMIN HYDROCHLORIDE, WHICH IS USEFUL AS A THERAPEUTIC DRUG FOR DIABETES AND THE LIKE, AND SUPERIOR IN THE PRESERVATION STABILITY. A SOLID PREPARATION HAVING A FIRST PART AND A SECOND PART: A FIRST PART: A PART CONTAINING COMPOUND (I) OR A SALT THEREOF AND SUBSTANTIALLY FREE METFORMIN HYDROCHLORIDE A SECOND PART: A PART CONTAINING METFORMIN HYDROCHLORIDE AND SUBSTANTIALLY FREE OF COMPOUND (I) AND A SALT THEREOF.