It is an object of the present invention to provide a pharmaceuticalcomposition containing a stable azole-based compound, which is useful as anantifungal agent. According to the present invention, the above-mentionedobjectcan be achieved by adding magnesium hydroxide carbonate, triethylamine,arginine,or another such basic substance to an azole-based compound that is unstable inacids. The above-mentioned pharmaceutical composition is stable enough thatthecompound will not degrade if the temperature, humidity, or other suchconditionsshould change during production or storage. Also, this composition is usefulas atherapeutic agent for deep mycoses because systemic administration is possiblebyapplying it to an oral agent or an injection.