A sheet music holder comprises a golpe board with a non-porous surface for gluing onto a guitar body with a porous surface, a twist lock power-assisted suction device, a clamp with a single tightening nut, and a sheet tray to hold the sheet music. The twist lock power-assisted suction device allows a user to easily create a strong vacuum attachment that will last for hours so a complete performance will not be interrupted. The golpe board is included where the guitar body has a porous surface that would otherwise frustrate the suction attachment. The double-ball and socket clamp and arm allows a variety of positioning possibilities for the user to best read the sheet music in the tray.