A hardtop convertible vehicle has a front roof part, a central roof part and a rear roof part that includes C-pillars and a rear window. The roof parts are connected to one another in an articulated manner and are movable between a closed roof position and an open roof position by means of a displacing device. In the open roof position, the roof parts are located in a trunk of the vehicle, with the rear roof part and the central roof part lying one above the other. The rear window of the rear roof part is mounted in an articulated manner in relation to the C-pillars of the rear roof part such that it is pivoted in relation to the C-pillars during the movement of the roof parts between the closed roof position and the open roof position and assumes a position with its curvature in the same direction as the central roof part. In the open roof position, the front roof part lies outside the rear roof part and the central roof part, either along a backrest or along a motor vehicle tank.