Three-dimensional interactions of an obliqueand a bow-shock wave at hypersonic speeds are numerically simulated using Navier-Stokes equations. Unstructured solution adaptive g,rids with h,ybrid cell configurations are used to accurately predict both the interaction pattern and the aerodynamic heatiqg. Two incident shock conditions are examined and the results are compared with a two-dimensional typeIV flow. The computed flows show three-dimensional complicated structures and they are well explained by examining the interaction flows in appropriate cross sections, whe,re well-investigated twodimensional interactions serve to understand the flow. In both three-dimensional cases, it is commonly said that a locally two-dimensional typeIV appears when a shock impinges around the stagnation region behind the bow shock wave. Other types simultaneously appear depending on the location of the impinging shock wave. A simple method to predict the three-dimensional interaction flow configurations is considered from the obtained results. The heat flux increases due to the impingement of the supersonic jet in both cases. The increments are much smaller than that of’ the two-dimensional typeIV because a strong jet bow shock is not generated in the threedimensional cases.