A roof system for a vehicle having a roof opening in a roof part thereof, comprising: at least a closure which is movable between a closed position in which it closes the roof opening and an open position in which it opens the roof opening and is positioned at least partially above a rearwardly adjoining roof part; a stationary guide rail at each longitudinal side of said roof opening, configured to slidably guide an operating mechanism that operates the closure in a longitudinal direction of the vehicle, said operating mechanism comprising: a first device configured to move a rear edge of the closure towards a raised position relative to the closed position and rearwardly above the adjoining roof part; a second device including a lever configured to move a front edge of the closure in a horizontal and vertical direction; and a guiding slide which is slidably accommodated in the guide rail and operably coupled to the first device and the second device so as to move the closure both in vertical and in horizontal directions through the first and second devices; wherein the lever of the second device has a pivotal connection to the closure and, remote from the pivotal connection, a sliding connection to the guiding slide by means of a first guide member and at least a further sliding connection to a first stationary guide curve by means of a second guide member during at least a part of the movement of the closure, characterized in that there is provided at least a third guide member on the lever of the second device arranged at a position forwardly of the pivotal connection to the closure and engaging a second stationary guide curve at least during a part of the movement of the closure. at least a closure which is movable between a closed position in which it closes the roof opening and an open position in which it opens the roof opening and is positioned at least partially above a rearwardly adjoining roof part; a stationary guide rail at each longitudinal side of said roof opening, configured to slidably guide an operating mechanism that operates the closure in a longitudinal direction of the vehicle, said operating mechanism comprising: a first device configured to move a rear edge of the closure towards a raised position relative to the closed position and rearwardly above the adjoining roof part; a second device including a lever configured to move a front edge of the closure in a horizontal and vertical direction; and a guiding slide which is slidably accommodated in the guide rail and operably coupled to the first device and the second device so as to move the closure both in vertical and in horizontal directions through the first and second devices; a first device configured to move a rear edge of the closure towards a raised position relative to the closed position and rearwardly above the adjoining roof part; a second device including a lever configured to move a front edge of the closure in a horizontal and vertical direction; and a guiding slide which is slidably accommodated in the guide rail and operably coupled to the first device and the second device so as to move the closure both in vertical and in horizontal directions through the first and second devices; wherein the lever of the second device has a pivotal connection to the closure and, remote from the pivotal connection, a sliding connection to the guiding slide by means of a first guide member and at least a further sliding connection to a first stationary guide curve by means of a second guide member during at least a part of the movement of the closure, characterized in that there is provided at least a third guide member on the lever of the second device arranged at a position forwardly of the pivotal connection to the closure and engaging a second stationary guide curve at least during a part of the movement of the closure.