Turbulence characteristics in the wake of a two-dimensional body with a splitter plate were investigated. The effect that a splitter plate can reduce the periodic vortex shedding has already been known, however, another effect of a splitter plate is not known in detail. Then, a splitter plate was used in order to control Reynolds shearing stress in this study. As the resalt of this study, it was found that there are optimum combinations of location and width of a splitter plate for the reduction of periodic vortex shedding and the increase of Reynolds shearing stress.