A food roasting apparatus. A main body has a heating chamber housing provided with a heating line, a rotating unit to rotate food, a water tank, and a falling substance guide for guiding oil falling from the food into the water tank. A steam control unit induces evaporated moisture to circulate in the heating chamber housing. A medicinal substance guide container disposed adjacent the steam control unit contains medicinal substances therein. An aroma of the medicinal substances permeates the food.