To provide a cutter wheel having a V-shaped sectional edge at the outer circumference of a disk-like wheel for cutting a brittle material such as a glass for liquid crystal panel, which prevents a slip on a glass plate and wear of the edge tip, has a good scribing performance, and prevents chipping of glass at a crossing when scribed lines are crossed.

The disk-like wheel is composed of diamond and a cutter wheel is made by forming an edge at the V-shaped tip by irradiating a laser beam to a direction crossing a circumferential direction of a slope forming a V-shape. Streaks are formed on the diamond by irradiating a laser beam. As the diamond a polycrystalline or a single crystal diamond is used.