A dial knob of a washing machine is provided. In the dial knob, a dial is inserted into a center part of a knob guard, and a periphery edge of the knob is formed to be lustrous. A lamp window body is securely attached on a rear surface of the knob guard. The knob guard is formed of an aluminum material. Thereafter, a front surface of the knob guard is formed to be lusterless and an edge of the front surface is formed to be lustrous. Finally, the dial is connected to the lamp window body.