Case shell

The invention discloses a case shell which comprises an upper shell, a lower shell, a left shell, a right shell, a front shell with buttons and a back shell with interfaces, and at least one of the upper shell, the lower shell, the left shell and the right shell is a heat dissipation shell with protrusions. According to the case shell, at least one of the upper shell, the lower shell, the left shell and the right shell is the heat dissipation shell with the protrusions, therefore the case shell has a heat dissipation function, enables a small-size case to be fast in heat dissipation, low in power consumption, energy-saving and environment-friendly and ensures that a host does not run slowly or crashes due to high temperature, the service life of every element in the case is prolonged, the problems including hand scalding and the like when a user touches the case shell do not occur either, meanwhile a copper pipe heat conducting exhaust fan is not needed for heat dissipation, and cost is saved.