A pick-up system is provided that can be suitably used irrespective of the type of the guitar by means of an arrangement of a plurality of pick-up coils that can appropriately conform to the curvature of the strings that are arranged in a stringed instrument. In accordance with the pick-up system of the present invention, it is possible to adjust the curvature of the roof surfaces of the pick-up coils in conformance with the bending of a pick-up board on which the pick-up coils have been mounted. Therefore, a distance that is always an appropriate distance can be maintained between each of the pick-up coils that are arranged on the pick-up board and each of the strings by means of the suitable adjustment of the curvature of the pick-up board. Accordingly, there is the advantageous result that the vibrations of each of the strings can be appropriately detected irrespective of the type of guitar.