Bolt-on neck is a method of guitar construction that involves joining a guitar neck and body using screws or bolts, as opposed to glue and joinery as with set-in neck joints.

The neck is the part of certain string instruments that projects from the main body and is the base of the fingerboard, where the fingers are placed to stop the strings at different pitches. Guitars, banjos, ukuleles, lutes, the violin family, and the mandolin family are examples of instruments which have necks. Necks are also an integral part of certain woodwind instruments, such as the saxophone.