An electronic device and a fixing module are provided. The electronic device further includes a housing and an antenna module. The antenna module includes an antenna, a first engaging portion and a second engaging portion. The first engaging portion and the second engaging portion are installed on two ends of the antenna. The first engaging portion includes an upper surface. The fixing module installed on the housing includes a first limiting element and a second limiting element. When the antenna module is fixed with the fixing module, the first limiting element is engaged with the first engaging portion, and the second limiting element is engaged with the second limiting element. The first limiting element includes a protrusion. When the antenna module is fixed with the fixing module, the protrusion covers the upper surface of the first engaging portion.