A dust-free and anti-vibration industrial computer. The industrial computer has a case sealed from the outside, a heat diffusion fin assembly mounted on the outer surface of the case, and a circulation pipe for allowing a heat generating component and at least a heat diffusion fin to be communicated with each other, or a heat pipe for transferring heat between the heat generating component and the heat diffusion fin. The heat generating component can be cooled in a state in which dust is prevented from being produced within the case.