Abstract: An operating mechanism for a slat shade assembly of the type mounted between a pair of glazing panels of a window. The mechanism includes a sash and a pair of glazing panels which are supported by the sash. A slat shade is operatively positioned in the space between the glazing panels. An operating mechanism is secured to the surface of the window sash frame and is located between the two glazing panels. The operating mechanism is operatively connected to a selected portion of the slat shade assembly for moving the slats of the slat shade assembly between two extreme positions. An opening is provided in one of the glazing panels in a position which is adjacent to the slat shade operating mechanism. A manual control member is mounted on the one glazing panel and passes through the opening in the one glazing panel. The manual control member is operatively interconnected to the operating mechanism so that the slat shade may be moved to a desired position by the manual control member.