Abstract: A scoring guide and glass cutter system is provided consisting of a guide assembly and a glass cutter holder. The guide consists of two L-shaped members to which are attached slide blocks which ride on slide block guides mounted on the side of the base members. A cutting board is placed between the base members and a guide bar is positioned on the slide blocks. The plate glass is positioned between the cutting board and the guide bar. The glass cutter holder has guide slots that ride on the guide bar. When in this position the glass cutter extends beyond the base of the holder and contacts the glass. The pressure of the cutter on the glass is constant.