A vacuum insulated switchgear has a busbar compartment, in which phase-segregated double-break, three-position vacuum circuit breakers are disposed; and feeder compartments disposed at both sides of the busbar compartment respectively, in each of which phase-segregated double-break, three-position vacuum circuit breakers are disposed. The busbar compartment and the feeder compartments are aligned in a row, and a second-phase insulated busbar is provided to connect one of the fixed contacts of a second-phase breaker in the busbar compartment to a fixed contact of a second-phase breaker in one of the feeder compartments. A first-phase insulated busbar is provided to connect one of the fixed contacts of a first-phase breaker in the busbar compartment to a fixed contact of a first-phase breaker in one of the feeder compartments adjacent to the busbar compartment, and the second-phase insulated busbar and the first-phase insulated busbar are disposed in different positions in height.