A contact switching device that drives a contact mechanical portion arranged inside a sealed space to switch contacts, based on excitation and degauss of an electromagnet portion arranged outside the sealed space, the contact switching device comprising: a ceramic component holding a pair of fixed contact terminals of the contact mechanical portion, the ceramic component comprising a pair of terminal holes (131 a) and a vent hole, wherein a metal layer is formed in an upper-surface outer circumferential edge portion, in opening edge portions of the terminal holes, and in an opening edge portion of the vent hole, respectively; a first metal component in the form of a metal frame body including a ring portion and an outer circumferential rib, wherein the ceramic component and the metal frame body are brazed to each other by a rectangular frame-shaped brazing material arranged in the upper-surface outer circumferential edge portion of the ceramic component, wherein a ring portion of the frame-shaped brazing material corresponds to the opening edge portion of the vent hole and the ring portion of the metal frame body is arranged overlaying on the ring portion of the frame-shaped brazing material; a metal cylindrical flange comprising an outer circumferential rib provided in an upper opening portion and being welded to and integrated with the outer circumferential rib of the metal frame body, wherein the ceramic component, the metal frame body and the metal cylindrical flange include the sealed space; and a metal vent pipe for inserting into the ring portion of the metal frame body and the vent hole of the ceramic component, wherein the vent pipe is brazed to the ceramic component through the ring portion of the metal frame body and the ring of the rectangular frame-shaped brazing material, wherein each of the fixed contact terminals extends through one of the terminal holes (131 a) and is brazed to the ceramic component by a ring shaped-brazing material, a ring for terminals and an additional ring-shaped brazing material sequentially put on the fixed contact terminals and arranged along the opening edge portion of the terminal hole provided in the ceramic component. a ceramic component holding a pair of fixed contact terminals of the contact mechanical portion, the ceramic component comprising a pair of terminal holes (131 a) and a vent hole, wherein a metal layer is formed in an upper-surface outer circumferential edge portion, in opening edge portions of the terminal holes, and in an opening edge portion of the vent hole, respectively; a first metal component in the form of a metal frame body including a ring portion and an outer circumferential rib, wherein the ceramic component and the metal frame body are brazed to each other by a rectangular frame-shaped brazing material arranged in the upper-surface outer circumferential edge portion of the ceramic component, wherein a ring portion of the frame-shaped brazing material corresponds to the opening edge portion of the vent hole and the ring portion of the metal frame body is arranged overlaying on the ring portion of the frame-shaped brazing material; a metal cylindrical flange comprising an outer circumferential rib provided in an upper opening portion and being welded to and integrated with the outer circumferential rib of the metal frame body, wherein the ceramic component, the metal frame body and the metal cylindrical flange include the sealed space; and a metal vent pipe for inserting into the ring portion of the metal frame body and the vent hole of the ceramic component, wherein the vent pipe is brazed to the ceramic component through the ring portion of the metal frame body and the ring of the rectangular frame-shaped brazing material, wherein each of the fixed contact terminals extends through one of the terminal holes (131 a) and is brazed to the ceramic component by a ring shaped-brazing material, a ring for terminals and an additional ring-shaped brazing material sequentially put on the fixed contact terminals and arranged along the opening edge portion of the terminal hole provided in the ceramic component.