This study was conducted to investigate the propagation characteristics of the floor impact sound transmitted from the household where the noise of the apartment building occurred to not only the floor directly below but also to other neighboring households. The floor impact sound of a rubber ball was measured on three upper and lower floors based on the excitation floor. The single-number quantity (L'iAFmax) was reduced to 16dB from 19dB in the measurement compared to the floor directly below the excitation floor. Although there is a difference in floor impact Sound Pressure Level (SPL) between apartment buildings on the floor directly below the excitation floor, the final attenuated floor impact SPL was found to be similar. When each frequency band was examined, the 125Hz band was the most attenuated, while the 500Hz band was the least attenuated. Furthermore, the sound receiving position, excitation position, and rubber ball drop height were found to have an impact not only in the immediate lower floor but also in all upper and lower adjacent households. Overall, the amount of floor impact sound attenuation varied depending on the excitation and sound receiving position, and such characteristics were found to vary by octave band.