The roadside soil in highway is exposed to the organic materials and the heavy metals by automobile flue gas, gasoline and various lubricating oils. In this study four measurement poits of the highly contaminated roadside soil and the uncontaminated background soil on the highway were monitored and analyzed. The concentrations of heavy metals in the roadside soil were 1 to 60 times higher than those in the backgroud soil(Cd, Pb). In the case Zn, it was 13 to 70 times. From this study, the heavy metals contamination in highway roadiside soil is relatively evaluated to be in good condition. This fact is due to the reduction of contamination materials by the use of unleaded gasoline or low sulfur diesel oil. However, because the total length of highway will be increasing by twice of current one and also the traffic amount increases in the same way, the contamination of roadside soil in highway is considerable proceeding up to high level of concerns. The continuous monitoring and analysis works, therefore, are necessary to be continued and also, the study on the wastewater treatment site such as wet land or retention pond needed for the furture work.