Playing the violin, a stringed instrument, requires the ability to apply many difficult techniques, very good bow control, and excellent right hand technique. For this reason, most violin pedagogues and authorities have given more importance to right and left hand techniques. However, left hand technique is as important as right hand technique and consists of masny sub-headings. These include the use of positions on all strings, double stops, triple and quadruple chords, natural and artifical harmonics, double stop harmonics, trill, double stop trill, vibrato, glissando, left hand tremolo and left hand pizzicato. In order to perform all these left hand techniques correctly, the left hand must be positioned in the correct position on the violin neck. Francesco Geminiani developed a technical application known as Geminiani Grip for the correct positioning of the left hand. In this study, Geminiani Grip will be examined in detail, examples from other violin authorities influenced by Geminiani will be given and exercises written in the light of this practice will be analyzed.