An inverted pendulum-type PMV (personal mobility vehicle) has been attracting attention as a low-carbon vehicle. For many people who like to use the PMVs, ride comfort is important. However, the problem of ride comfort has not attracted much attention in previous studies. The vibration is one of the important indicators for evaluating ride comfort. The PMV is unstable system. Therefore, the vibration may be generated when the PMV is stabilized. This study investigates the horizontal and vertical vibration of the head of the occupant when the PMV runs on a road with disturbances in numerical simulations. Frequency characteristics of the inverted pendulum-type PMV is analyzed to verify what vibrational factors that worsens ride comfort are. To consider human vibration sensitivity, the frequency weighting proposed in ISO2631-1 is used as the evaluation standard. The improvement methods are proposed from both software and hardware, and it is confirmed that the proposed method can improve ride comfort.