Abstract: The sunroof structure comprises a molded plastic frame preferably having a ribbed cross section for providing rigidity to the frame. The frame is suitably supported from the vehicle roof structure which has an opening aligned with a gasket for forming a peripheral seal between the vehicle metal roof and the sunroof which is preferably constructed of a plexiglass or acrylic material. The sunroof is manually slidable to cover or uncover the opening in the vehicle roof and is locked by means of a toggle arm arrangement when in its closed position. A lifter bar assembly is provided for locking and sealing the sliding sunroof. This assembly preferably pivots at the front end and includes a lifter link for lifting the roof into a tight closed position. When the lifter bar assembly is released, the lifter bar and sunroof disengage from the roof gasket and the sunroof can then be moved rearwardly.