In order to determine the content of heavy metal in common salts, 35 bay salt samples, 7 refined salt samples, 7 fine salt samples, 5 bake salt samples and 5 bamboo bake salt samples were collected from old market in major cities. Heating bay salt 35 samples, it made heating bay salt of $500^{circ}C$, (34 samples), heating bay salt of $1000^{circ}C$(35 samples). These were analysed for contents of lead(Pb), cadmium(Cd), iron(Fe) and zinc(Zn) by atomic absorption spectrophotometer. The results were as follows : Mean content of lead in bay salts was $0.124{pm}0.035ppm$ refined salt was $0.130{pm}0.019ppm$, fine salt was $0.073{pm}0.036ppm$ bake salt was $0.097{pm}0.023ppm$, bamboo bake salt was $0.117{pm}0.020ppm$, heating bay salt was $0.063{pm} 0.021ppm$ in $500^{circ}C$, heating bay salt was $0.063{pm}0.039ppm$ in $1000^{circ}C$. And bay salt refined salt bamboo bake salt were not significant one another. Mean content of cadmium in bay salts was $0.031{pm}0.008ppm$ refined salt was $0.032{pm}0.003ppm$, fine salt was $0.037{pm}0.005ppm$, bake salt was $0.169{pm}0.117ppm$ bamboo bake salt was $0.079{pm}0.052ppm$, heating bay salt of $500^{circ}C$ was $0.030{pm}0.029ppm$ heating bay salt of $1000^{circ}C$ was $0.017{pm}0.013ppm$. And bay salt refined salt, fine salt were not significant one another. Mean content of iron in bay salts was $1.025{pm}0, 634ppm$, refined salt was $0.359{pm}0.163ppm$ fine salt was $0.267{pm}0.068ppm$, bake salt was $2.929{pm}1.963ppm$, bamboo bake salt was $5.378{pm}3.676ppm$, heating bay salt of $500^{circ}C$ was $0.847{pm}0.315ppm$ heating bay salt of $1000^{circ}C$ was $0.991{pm}0.868ppm$. And bay salt refined salt, fine salt, bake salt, bamboo bake salt were significant one another(p<0, 01). Mean content of zinc in bay salts was $0.253{pm}0.154ppm$, refined salt was $0.263{pm}0.091ppm$ fine salt was $0.187{pm}0.015ppm$, bake salt was $0.166{pm}0.034ppm$, bamboo bake salt was $0.282{pm}0.064ppm$, heating bay salt of $500^{circ}C$ was $0.253{pm}0.085ppm$, heating bay salt of $1000^{circ} C$ was $0.242{pm}0.179ppm$. And bay salt refined salt fine salt, bake salt, bamboo bake salt were not significant one another,