To provide an expansion gate in which angle regulating members can be easily adjusted depending on an angle of a sloping land and which can easily secure overall fastness.

The expansion gate includes a plurality of vertical frames 7 arranged at approximately equal spaces in an inclined direction, two pairs of upper and lower pantograph mechanisms 13 arranged expansively in the inclined direction with one 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 pivotally supported on the vertical frames 7 via fixed pivots 12 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. Linking and fixing means 24 are provided for interlocking the angle regulating members 23 with one another during the angle adjustment of the angle regulating members 23, and for fixing the angle regulating members 23 to the vertical frames 7 after the adjustment.