The invention relates to a wind deflector of an openable vehicle roof, with a base element that can be attached to the vehicle roof, with a raising bow that can be deployed relative to the base element, and with a flexible wind deflector element which is attached with its upper edge to the raising bow and with its lower edge to the base element, and which is held tensed between the raising bow and the base element when the raising bow is deployed, wherein it is provided according to the invention that, when the raising bow is deployed, a lateral end section of the wind deflector element is in a tensed position without attachment at its lower edge relative to the base element or a roof frame and/or without attachment at its upper edge relative to the raising bow.