<p>A security gate comprises a pair of posts fixed adjacent opposing sides of a gate opening. The gate includes a pair of first gate panels pivotally mounted on the posts and second gate panels pivotally coupled to the outer ends of the first gate panels respectively so that the second gate panels meet one another in the closed position of the gate. Each first gate panel and the respective second gate panel pivotally coupled thereto are moveable together between an open position folded adjacent the respective post and a closed position spanning across the gate opening. A drive linkage is coupled between each post and the inner end of the respective first gate panel pivotally coupled thereto to drive pivotal movement of the first gate panel between the open and closed position. A guide mechanism is coupled between t he fixed post and the inner end of the second gate panel for guiding pivotal movement of the second gate panel between the open and closed positions responsive to movement of the first gate panel.</p>
