ROOF SYSTEM

A roof system comprises a stationary part configured to be attached to a fixed roof and includes guide rails on opposite sides of a roof opening. The guide rails slidably support an operating mechanism for a panel and include guide grooves bordered by guide flanges. The operating mechanism includes a driving slide for a panel front support, and a panel rear support. The rear support is connected to a panel bracket guide of a panel bracket extending alongside a corresponding edge of the panel. The panel bracket guide slidably engages the rear support so as to enable the panel to slide with respect to the rear support when the front support is driven by the driving slide. The front support engages a guide rail groove of an upright flange of each guide rail while the panel bracket guide extends mainly on the other, inner side of said upright flange.