Seismic noise has been widely used to image Earth’s structure in the past decades as a powerful supplement to earthquake signals. Although the seismic noise field contains both surface-wave and body-wave components, most previous studies have focused on surface waves due to their large amplitudes. Here, we use array analyses to identify body-wave noise traveling as PKP waves. We find that by cross-correlating the array-stacked horizontal- and vertical-component data in the time windows containing the PKP noise signals, we extract a phase likely representing PKS-PKP. This phase can potentially be used for shear-wave splitting analysis and studying core-mantle boundary structure. Our results also suggest that the sources of body-wave noise are extremely heterogeneous in both space and time, which should be accounted for in future studies using body-wave noise to image Earth structure.