Aerodynamic characteristics of fore-bodies deduced simply from 2D configurations were studied. To restrain the compressed flow from spilling at side edges of forebodies, shaped waverider was added to the fore-body sides and features of the new fore-body as waverider were proven by CFD analysis. More discussion about volume efficiency of the new shape was made and a concept as usable volume efficiency was presented. Different shapes side edges were designed, usable volume efficiency of each shape was discussed together with aerodynamic characteristics.