This study was to evaluate the structural performance by experiments through void former installation methods of hollow core slab using deck plate. Bending strength of horizontal types were almost the same strength with solid type, but vertical and mixed types were sufficient bending strength about 85% of horizontal types and appeared shear failure modes. Shear strength of horizontal types were evaluated about 50% of existing slab, because of insert whether or not void former of slab using V-deck. This was almost proportion value with effective area rate of existing slab and hollow core slab, but vertical type in strength of about 38% compare with none void former type was smaller the effective area ratio. Therefore, according to install vertical type to peanut type void former, Shear strength of slab type solid effort of 30% or less limited to the portion that is considered desirable to use. According to the results of experiment, a similar to flexure stiffness for void slab using truss deck and V-deck. Special regard will be paid to the fact that shear capacity is a rapid decrease to the installation method of void former.