Overset Unstructured Grids method is extended to the viscous flow computations of the multiple bodies in contact. In this paper, the overset treatment of hybrid meshes composed of tetrahedral , prismatic, pyramidal elements . is discussed in detail when those elements are embedded or contac ted to the wall boundary of another grid. This method is applied to the ONERA M5 wing -body model and computed by the Navier -Stokes code. The computational results show good agreements with those obtained by single grid and experimental data. The boundary l ayer in the intersection region between two grids is well captured without the collar grid.