A wind deflector for a partially releasable opening of a roof of a motor vehicle, which can be closed by means of a mobile roof part, said opening comprising a glass element forming an edge of the roof opening and/or part of the roof, a connection element which is fixed to an edge section of the glass element, facing the interior of the motor vehicle, a detachable element which can be detached from the glass element, and a clampable deflector element which is fixed to the detachable element with one of the edge sections thereof and to the connection element with the other edge section thereof.