Gas circuit breaker

A gas circuit breaker comprising:

• a first fixed contact and a second fixed contact arranged facing each other at a predetermined interval in an axis line direction, each of the first and second fixed contacts being formed of an elastically deformable material in an annular shape around an axis line;
• a movable contact inserted into the first and second fixed contacts and reciprocally movable along the axis line direction between a current supply position where the movable contact bridges the first fixed contact and the second fixed contact and a current cutoff position where the movable contact is separated from both the first and second fixed contacts;
• a first holding tool formed in an annular shape and attached to a surface of the first fixed contact on a side of the second fixed contact;
• a second holding tool formed in an annular shape and attached to a surface of the second fixed contact on a side of the first fixed contact;
• a first covering member having electrically insulating property, slidably attached to a distal end portion of the first holding tool and covering at least an inner diameter side of the distal end portion, the first covering member being slidable in the axis line direction so as to be brought into contact with the first fixed contact in a state of being arranged nearest to the side of the first fixed contact;
• and
• a second covering member having electrically insulating property, slidably attached to a distal end portion of the second holding tool and covering at least an inner diameter side of the distal end portion, the second covering member being slidable in the axis line direction so as to be brought into contact with the second fixed contact in a state of being arranged nearest to the side of the second fixed contact.