This experiment was conducted to study the effects of Briquette ash as a substitutive material for Fe injection and mineral supplements in pigs from April 1, 1981 to July 19, 1984. Birth weight of the Briquette ash fed group was slightly higher than that of the control group. From birth to weaning time the Briquette ash caused high survival rate (p$lt;0.02) compared to the control groups. During growing-finishing period, pigs fed Briquette ash ad libitum gained more weight and consumed more feed. Feed conversion was also improved by feeding Briquette ash ad libitum. In conclusion, it might be suggested that the pigs farrowed from sow fed ad libitum Briquette ash could grow without Fe injection and when fed Briquette ash ad libitum, grorving-finishing pigs could gain more rapidly.