PURPOSE: A vacuum interrupter for an ultra high voltage is provided to accurately perform a stop operation by inserting a buffer spring between a movable electrode unit and a metal end. CONSTITUTION: A vacuum container(50) is sealed with a vacuum state. A friction reducing device is installed between a guide connection unit(57) and a movable electrode unit(55) and reduces a frictional force of the movable electrode unit. The movable electrode unit slides along the guide connection unit. A buffer spring(62) elastically supports an axial movement of the movable electrode unit.
