ESD PROTECTION DEVICE AND MANUFACTURING METHOD THEREOF

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Provided are an ESD protection device and a manufacturing method thereof, wherein short-circuit malfunctioning is rare while excellent discharging capability is maintained, no special process is needed upon manufacturing, and the productivity thereof is excellent. The ESD protection device is provided with : a ceramic base material (1) having a glass ingredient; opposing electrodes (2) comprising a first opposing electrode (2a) and a second opposing electrode (2b), which are formed inside the ceramic base material so as to have the front tip sections thereof opposed to each other through a prescribed gap; and a discharge-assisting electrode (3) that is arranged between the opposing electrodes (2) so as to be connected to the first and second opposing electrodes, and so as to span across from the first opposing electrode to the second opposing electrode. The ESD protection device is also configured to be provided, between the discharge-assisting electrode and the ceramic base material, with a sealing layer (11) for preventing immersion of the glass ingredient from the ceramic base material to the discharge-assisting electrode.