PURPOSE: To allow the extremely easy and rapid knowing of positions of desired chords or ad lib., etc. by superposing position display graphics separately and previously applied with identification displays only in the desired positions on the graphics of the entire part of a finger board so that only the desired positions on the graphics of the entire part of the finger board are made conspicuous together with the tone names thereof by the identification displays.

CONSTITUTION: A position card 7 freely slidably fitted to a graphic board 1 is properly operated to slide and the desired tone names in the basic tone display column 11 of the position card 7 in positioning windows 6 on the graphic board 1 are selected to be matched and exposed. The position display graphics 10 of the position card 7 mate and overlap on the graphics 3 over the entire part of the finger board on the graphic board 1 and only the desired positions 4 in the graphics 3 over the entire part of the finger board of the guitar on the graphic board 1 appear in relief and conspicuous together with the tone names thereof by the identification displays 8 of proper colors, patterns, etc. The desired guitar positions are extremely easily exposed and known on the graphics 3 over the entire part of the finger board of the guitar on the graphic board 1 in this way.