A device for preventing unintentional removal of a guitar strap from a guitar strap peg. The device includes a body for positioning on the guitar strap peg, outboard of the guitar strap. The body is disk-shaped and has a periphery, a throughbore extending centrally therethrough, and a throughslot communicating with the throughbore therein and the periphery thereof, and is for allowing the neck of the guitar strap peg to slide therein, and into the throughbore, and when therein, one surface of the body is wedged against the head of the guitar strap peg, and an opposing surface of the body wedges the guitar strap against the guitar, and when doing so, prevents the slot in the guitar strap from escaping past the head of the guitar strap peg, and in doing so, prevents the guitar strap from being unintentionally removed from the guitar strap peg.