The invention relates to a wind deflector for a roof opening, which can be closed and opened, in a roof panel of a vehicle. According to the invention it is contemplated that an elastic element, which is fixed with respect to the frame of the roof opening, engages on the wind deflector arm and applies a force thereon in of the longitudinal direction, and an arm, which at one end is connected to the wind deflector arm rotatably about the transverse direction, is mounted at the other end rotatably with respect to the frame of the roof opening in of the transverse direction. The invention further relates to a method for actuating a wind deflector.