Abstract: A safety plate assembly that can be easily assembled to a conventional electric outlet using standard mounting methods. The safety plate assembly has openings for accommodating standard electric outlets. The assembly includes a cover plate with parallel guides. A slidable shutter slides along the parallel guides to cover and uncover the live openings of an electric outlet. The shutter has prongs that hold an electric plug into the electric outlet so the plug cannot be unintentionally removed. The assembly has locks on opposite sides of the slidable shutter, so that the small hand of a toddler cannot unlock both locks at the same time. The shutter can be locked into an open, closed, or holding position.