Abstract: The window covering cord safety assembly includes at least one window covering control cord bearing an eyelet on its free end, preferably about 4 such cords with eyelets, and a safety device connected to the free end of the control cords through the eyelets and adapted to release all but one of the cords at a predetermined pull pressure. The device includes a closed housing having an upper end having control cord openings, an opposite lower end, interconnecting sidewalls and a generally central space. The upper portion of the space has a larger diameter than the lower portion of the space. A retainer is slideably received in the space for movement between the lower portion and upper portion of the space. The lower portion of the retainer is preferably inverted conical. The retainer has spaced pockets in which the eyelets are received and trapped when the retainer is in the lower portion of the space, but are released when the retainer is in the upper portion of that space.