A fastening assembly and a cushion having the same are disclosed. The fastening assembly includes a first band, a second band, and a third band. The first band has a first surface protrudingly provided with a plurality of hooks, and a second surface provided with a magnetic layer. The second band is made of a sponge material and is provided lengthwise with a central concave portion and bilaterally with sidewalls. The first band is placed on the central concave portion. The depth of the central concave portion is greater than the thickness of the first band plus the hooks. The third band is bonded to a bottom surface of the second band with another magnetic layer disposed between the second band and the third band.