A sterilization case (1-9) comprising: a case main body , which can house a mobile communication device, having a loading part with a surface on which an electrode sheet is laid and a voltage supplying part for supplying a predetermined voltage to the electrode sheet and the mobile communication device ; and a cover body attached to the case main body in an openable and closable manner, wherein the voltage supplying part comprises: a first circuit for converting a power source into a voltage necessary to generate ozone and supplying the voltage to a pair of electrodes in the electrode sheet ; and a second circuit for converting the power source into a power source voltage of the mobile communication device and supplying the power source voltage to a male connector connectable to a female connector for power supply to the mobile communication device , characterized in that the mobile communication device can be loaded on the electrode sheet , the electrode sheet is formed by a sheet-like dielectric and the pair of electrodes housed within the sheet-like dielectric , at least the dielectric of the electrode sheet is formed of polymeric resin, and the loading part is provided with a maintaining part for maintaining the distance between the electrode sheet and the mobile communication device or a case of the mobile communication device loaded on the loading part within a range of 10 mm or less. a case main body , which can house a mobile communication device, having a loading part with a surface on which an electrode sheet is laid and a voltage supplying part for supplying a predetermined voltage to the electrode sheet and the mobile communication device ; and a cover body attached to the case main body in an openable and closable manner, wherein the voltage supplying part comprises: a first circuit for converting a power source into a voltage necessary to generate ozone and supplying the voltage to a pair of electrodes in the electrode sheet ; and a second circuit for converting the power source into a power source voltage of the mobile communication device and supplying the power source voltage to a male connector connectable to a female connector for power supply to the mobile communication device , characterized in that a first circuit for converting a power source into a voltage necessary to generate ozone and supplying the voltage to a pair of electrodes in the electrode sheet ; and a second circuit for converting the power source into a power source voltage of the mobile communication device and supplying the power source voltage to a male connector connectable to a female connector for power supply to the mobile communication device , characterized in that the mobile communication device can be loaded on the electrode sheet , the electrode sheet is formed by a sheet-like dielectric and the pair of electrodes housed within the sheet-like dielectric , at least the dielectric of the electrode sheet is formed of polymeric resin, and the loading part is provided with a maintaining part for maintaining the distance between the electrode sheet and the mobile communication device or a case of the mobile communication device loaded on the loading part within a range of 10 mm or less. <EOS>