A surge absorber in which an
oxide layer excellent in
chemical stability in the high temperature range and excellent in adhesion to main
discharge electrodes is deposited on the main
discharge electrodes. The surge absorber comprises a cylindrical
ceramic body (4) on which conductive films (3) separated by a
discharge gap (2) are formed, a pair of main discharge
electrode members (5) opposedly disposed at both ends of the cylindrical
ceramic body (4) and in contact with the conductive films (3), and a tubular
ceramic body (7) in which the paired main discharge
electrode members (5) are opposed, the cylindrical ceramic body (4) is contained, and a filling gas (6) is sealed. Each of the paired main discharge
electrode members (5) has a projecting support (9). The opposed surfaces of the projecting supports (9) serve as main discharge surfaces (9A).
Oxide films (9B) are formed on the main discharge surfaces (9A) by oxidation.