The Rickenbacker 360/12 is a semi-hollow body with set neck construction electric guitar made by the Rickenbacker company; it was among the first electric twelve-string guitars. This instrument is the 12 string variant of the Rickenbacker 360. Rickenbacker uses an innovative headstock design that incorporates both a slotted-style peghead and a solid peghead, thereby eliminating the need for the larger headstock normally associated with a twelve-string guitar.
Another feature unique to Rickenbacker twelve-strings is the ordering of the courses. Most twelve-strings have the octave course on the bass side of the standard course; Rickenbacker reverses this convention. This feature along with the semi-hollow body design and thru-body neck structure contribute to its unique timbre. The 360/12 was given worldwide attention when George Harrison used it on many Beatles recordings, introducing the distinctive new sound of this guitar on "I Call Your Name", which the band recorded in March 1964. In the late 1960s, the company made alternative models such as the Rickenbacker 370/12, which became the favored instrument of Roger McGuinn of the Byrds.