A slide assembly used for installing a chassis to a rack includes an engaging member which includes a body portion, a first fastening portion and a second fastening portion. The first and second fastening portions are perpendicularly connected to an end of the body portion. The second fastening portion bends and extends from an end of the first fastening portion. An engaging space is bounded by the second fastening portion and the rack when the slide assembly is installed to the rack. A hook portion of the chassis can be inserted into the engaging space to contact against the second fastening portion so that the chassis is not allowed to be pulled out from the rack when the chassis is installed to the rack.