A switchgear having an interlock function for blocking movement of a circuit breaker to the connecting position side when an earth switch is in a closed state at the disconnect position of the circuit breaker. When the circuit breaker (11) is at the disconnect position, an ES interlock cam (37) fixed to an ES operation spindle (22) is rotated by an operation for closing the earth switch (ES) by rotating the ES operation spindle (22). An ES interlock lever (36) interlocked with that rotary operation is thereby driven and rotated to press and move a draw-out device interlock frame (32), and itsdistal end engages with a protrusion (31) provided on the moving shaft (25) of the draw-out device, thus blocking rotation of the moving shaft (25).