Rice hull, which is one of the agricultural wastes in Japan, is required to be reused as an industrial material. The rice hull silica carbon powder (RHSC powder), made from rice hull, is manufactured by mixing rice hull particles with phenol resin, and then carbonizing the mixture in nitrogen gas atmosphere at high temperatures. The RHSC powder is constituted by C and SiO 2 . Therefore, it has excellent water resistance and corrosion resistance. In addition, the RHSC powder has a porous structure unique to rice hull. One of the effective ways to utilize of the RHSC powder is the use as a filler for polymers and rubbers to improve the mechanical strength and electrical conductivity. In this study, focusing on the porous structure of the RHSC powder, improvement of adhesive strength was investigated by blending the adhesive with RHSC powder. By blending with the RHSC powder as the filler, adhesive strength was improved by an anchor effect. In addition, the experiments were carried out by changing the test conditions such as particle size and blending ratio of the adhesive. Since the improvement effect to destruction was elucidated, a wide range of applications to the wooden adhesive products are expected.