Jazz guitar may refer to either a type of electric guitar or a guitar playing style in jazz, using electric amplification to increase the volume of acoustic guitars.
In the early 1930s, jazz musicians sought to amplify their sound to be heard over loud big bands. When guitarists in big bands switched from acoustic to semi-acoustic guitar and began using amplifiers, it enabled them to play solos. Jazz guitar had an important influence on jazz in the beginning of the twentieth century. Although the earliest guitars used in jazz were acoustic and acoustic guitars are still sometimes used in jazz, most jazz guitarists since the 1940s have performed on an electrically amplified guitar or electric guitar.