Abstract: This invention relates a computer housing, which comprises a body and a heat-dissipating gate. The body has at least one opening formed with two holders on two opposite sides of the opening. In addition, the heat-dissipating gate is installed between the holders and comprises a plurality of blades, a transmission device and a motor. Each of the blades has a shaft connected with the holders so that the blades are rotatable between the holders. The transmission device is provided for transmitting the blades to rotate synchronously and the motor is provided for driving the transmission device. Accordingly, heat generated within the computer housing can be dissipated out of the computer housing efficiently by applying the heat-dissipating gate to control an open status of the opening.