To provide an expansion gate adaptable to a sloping land and easily openable/closable by expansion and contraction of part of a gate body when required.

The expansion gate includes a plurality of vertical frames 7 arranged at approximately equal spaces in an inclined direction, pantograph mechanisms 13 arranged expansively in the inclined direction with ones of a plurality of upper and lower intersection parts 10, 11 pivotally mounted on the vertical frames 7 via fixed pivots 12, and angle regulating members 23 provided on the vertical frames 7 in an angle adjustable manner for guiding movable pivots 30 of the others of the plurality of upper and lower intersection parts 10, 11 of the pantograph mechanisms 13 in an up-and-down movable manner to regulate inclination angles of the pantograph mechanisms 13. A middle one of the plurality of vertical frames 7 is a sectional vertical frame 72, and the pantograph mechanisms 13 on both right and left sides of the sectional vertical frame 72 are expandable separately.