The Baroque guitar is a guitar from the baroque era (c1600-1750), an ancestor of the modern classical guitar. The term is also used for modern instruments made in the same style.

The instrument was smaller than a modern guitar, of lighter construction, and had gut strings. The frets were also usually made of gut, and tied to the neck. A typical instrument had five courses , of which either four or five were double-strung making a total of nine or ten strings.

The conversion of all courses to single strings and the addition of a bass E-string occurred during the era of the early romantic guitar.