This study was an investigation of the engineering properties of selfcompacting concrete (SCC) containing oxidizing and reducing slag generated from stainless steel making. The stainless steel oxidizing slag (SSOS) was employed as fine and coarse aggregates substituting to natural materials with various percentages (0%, 50%, and 100%). Meanwhile, the stainless steel reducing slag (SSRS) partially replaces for Portland cement (0%, 10%, 20%, and 30%). As a result, a total of 12 mixtures with a fixed water-binder ratio (w/b = 0.4) were developed in laboratory and its properties in hardened properties such as compressive strength, ultrasonic pulse velocity and surface resistivity were experimentally examined. The results indicated that 100% SSOS substitutes to aggregates and 30% SSRS substitutes to Portland cement in SCC, the values of compressive strength, electrical resistivity and the 91 day ultrasonic pulse velocity are within the good quality concrete requirement. It could save 43% cost of SCC with this substitution. It will contribute to environmental protection and the resource recycling initiative.