Abstract: A wind deflector of a vehicle sunroof for effectively reducing droning noise that is generated when the sunroof is open includes a deflector bar rotating to unfold and fold a mesh deflector and divided into a front deflector bar and rear deflector bars so that a length of the deflector bar is changed by stretching and contracting when rotating the deflector bar. When the mesh deflector bar is unfolded upward with opening of the sunroof, the front deflector bar is linearly moved forward (in a front-rear direction of the vehicle) by guide bars rotatably coupled to a sunroof frame such that an upper end is moved ahead of an lower end of the mesh deflector.