Gold particles supported on titanium dioxide (TiO2) are known to activate many catalytic reactions. In this study, interface structure of gold on anatase was examined in the case on an anatase {101} surface, since the surface is the most important for several photocatalytic reactions. Anatase TiO2 nanorods having clear washboard-like {101} outer surfaces were synthesized by using a double surfactants system. From high resolution electron microscopy observation for gold particle on the {101} surface, the (113) plane of gold was found to be parallel to the (101) surface of TiO2. Such an cpitaxy is corresponding to be the axial and planar orientations of [03 (1) over bar] (200)Au // [(3) over bar1 (1) over bar] (113)TiO2, being originated from the smallest lattice mismatching, instead of the previous cases of [01 (1) over bar] (111)Au // [02 (1) over bar] (112)TiO2 on the {110} and {112} surfaces of anatase TiO2. [doi:10.2320/matertrans.MB201004]