A buckling mechanism used to fasten an electronic device such as a wireless broadband access point device or a wireless broadband router onto a bracket. The electronic device includes a top plate and a side plate having a side-plate aperture. The bracket is disposed on the top plate and has a bracket aperture. The buckling mechanism includes a first body portion, an embedding portion, a second body portion and a buckle portion. The embedding portion is disposed on one side of the first body portion to be embedded into the side-plate aperture. The second body portion is perpendicular and connected to another side of the first body portion, while the buckle portion is disposed on another side of the second body portion to be buckled with the bracket aperture.