A support device for holding guitar or other stringed instrument. The support assembly includes a base for mounting on a structure such as a wall or an amplifier. A bracket extends from the base and has an opening for receiving an instrument neck. The opening has an entrance through which the side of the neck enters. An entrance ramp guides the neck into the opening and a finger extending slightly into the entrance opposite the ramp restricts inadvertent withdrawal of the neck from the opening. In one embodiment, several such openings are provided along a member that can be fastened to a wall. Another embodiment has a single opening, with a strong permanent magnet opposite the opening to hold the device to a magnetic metal structure such as an amplifier.