OCCUPANT POSTURE CONTROL METHOD AND OCCUPANT POSTURE CONTROL DEVICE

An occupant posture control method is provided that can suppress motion sickness. The occupant posture control method comprises executing Steps S102 to S110 for predicting a vehicle motion based on information relating to the vehicle motion, and executing Steps S110 and S111 for imparting a stimulus that generates a muscle tension such that the occupant assumes a posture corresponding to the vehicle motion, when a predicted vehicle motion occurs.