Roasted rice is the main raw material for cooking in Thailand, especially the northeastern part. The objectives of this study were to design and construct a roasting machine using infrared rays, and to evaluate the qualities of roasted rice. The stainless steel roasting chamber was designed as a rotatable drum with a diameter of 0.6 m and a length of 1 m. An infrared burner was mounted inside the chamber. The performance of the rice roasting machine was tested at infrared burner temperature of 750 – 800˚C, and drum speed of 5–7 rpm. The results showed that the optimum roasting conditions of the machine were a drum speed of 6 rpm, infrared burner temperature of 800 ˚C and roasting time of 40 minutes. With those conditions, roasted rice would have similar quality comparing to other roasted rice in the market.