The utility model relates to a computer shell which can change the installation direction of a data access arrangement, which comprises a shell body, a slide rail seat arranged in the shell body and a 2.5-inch data access arrangement bracket the bottom side of which works in with the top side of the slide rail in a sliding way, wherein the top side of the slide rail is provided with two slide rails parallel to each other, a plurality of sliding blocks are convexly arranged on the bottom side of the data access arrangement, the spacing between two adjacent sliding blocks is same and at the same time the spacing between the two slide rails parallel to each other is equal to the spacing between two random adjacent sliding blocks. With the device, the data access arrangement bracket for loading the 2.5-inch hard disk can be arranged in the computer shell body in two different directions, thus the user can make a adjustment according to the number, shape and size of each component inside the computer, thus the components are not enabled to interfere with each other.