A fixing bracket for a computer accessory and a computer case thereof are discloses. The fixing bracket is for the installation of the computer accessory. The interior of the computer case is used for the assembly of the fixing bracket. The fixing bracket includes a carrier, a clamping part, and a limiting part. The carrier plate has a surface for stacking the computer accessory, and a first side edge and a second side edge opposite to one another. The clamping part is disposed on the first side edge. The limiting part is disposed on the second side edge. The computer accessory is stacked on the carrier plate. The clamping part clamps one end portion of the computer accessory and the limiting part tightly presses against the other end portion of the computer accessory such that the computer accessory is attached against to the carrier plate.