A coachbuilder or body-maker is someone who manufactures bodies for passenger-carrying vehicles. Coachwork is the body of an automobile, bus, horse-drawn carriage, or railway carriage. The word "coach" was derived from the Hungarian town of Kocs. A vehicle body constructed by a coachbuilder may be called a "coachbuilt body" (British English) or "custom body" (American English).

Prior to the popularization of unibody construction in the 1960s, there were many independent coachbuilders who built bodies on chassis provided by a manufacturer, often for luxury or sports cars. Many manufacturers such as Ferrari outsourced all bodywork to coachbuilders such as Pininfarina and Scaglietti. Coachbuilders also made custom bodies for individual customers. The coachbuilder craftsmen who might once have built bespoke or custom bodies continue to build bodies for short runs of specialized commercial vehicles such as luxury motor coaches or recreational vehicles or motor-home bodied upon a rolling chassis provided by an independent manufacturer. A 'conversion' is built inside an existing vehicle body.

Several renowned automotive coachbuilders, including Pininfarina, Bertone, and Ghia, are based in Italy. In the Italian language, a coachbuilder is called a carrozzeria.