A Car chassis (plural: "chassis") (pronounced /ˈʃæsi, ˈtʃæsi/) consists of a framework that supports a man-made object, analogous to an animal's skeleton, for example in a motor vehicle or a firearm.Examples of use1950s Jeep FC cowl and auto chassis for others to convert into finished vehicles.

In the case of vehicles, time frame and landing gear, like engine, gearbox, driveshafts, differential and suspension. A body (sometimes referred to as Agency ), which is generally not necessary for the integrity of the structure is entirely built on the chassis of the vehicle. commercial vehicle manufacturers may not frame, hood and chassis with cab and body variants can be equipped with special equipment. This includes motor homes, fire trucks, ambulances, trucks, boxes, etc.

* In computers, the chassis refers to the rigid framework onto which the motherboard, memory, disk drives, and other equipment are mounted. It also supports the shell-like case: the housing that protects all of the vital internal equipment from dust, moisture, and tampering. The term "case modding" refers to the artistic styling of otherwise rather functional and plain computer encasings. Main article: computer case for personal machines or rack mount for commercial grade servers.

* A armoured fighting vehicle's  chassis (hull) comprises the bottom part of the AFV, which includes the tracks, engine, driver's seat, and crew compartment. This describes the lower hull, although common usage of might include the upper hull to mean the AFV without the turret. Chassis often serve as basis for platforms on tanks, armored personnel carriers, combat engineering vehicles, etc.

* A chassis in a television, radio, or other electronic device consists of the metal frame on which the circuit boards and other electronics are mounted. In the absence of a metal frame the chassis refers to the circuit boards and components themselves, not the physical structure.