Abstract: The folding security gate folds up vertically against a door frame when not in use. The gate is fabricated from four U-shaped channels hinged together to form a rectangular frame. Strands of netting material are stretched across the opening of the frame and are attached to the frame. One side of the frame is disposed against the door frame and secured thereto either permanently or temporarily as desired. The remaining segments of the frame are hinged together in a manner to allow rotation.