A dismounting jig adapted for removing a metal shield which is coupled with a lens module and has two projections at two opposite sides thereof. The dismounting jig has a main body and two clutching arms. Each of the clutching arms has a fixing plate and a holding portion connected with the fixing plate. A lower portion of the holding portion has a buckling slice protruded inward. Two opposite sides of the holding portion extend perpendicularly to form a pair of opposite stabilizing wings locating at a same side as the buckling slice with respect to the holding portion. The clutching arms are symmetrically mounted on the main body by the fixing plates thereof fixed on two opposite sides of the main body. A receiving space is formed among the two pairs of the stabilizing wings and the holding portions.