VEHICULAR DRIVE ASSIST DEVICE, AND VEHICULAR DRIVE ASSIST METHOD

A vehicle travel controller (103) carries out automatic travel control of controlling a vehicle to travel automatically based upon travel state information of the vehicle and information on an exterior of the vehicle. An automatic/manual traveling changeover switch (111) is capable of switching between an automatic driving mode in which the automatic travel control is carried out by the vehicle travel controller (103) and a manual driving mode in which the driver drives the vehicle manually. A driving posture controller (113) controls a reclining motor (21) so that the reclining angle of the driver's seat in the automatic driving mode is larger than the reclining angle of the driver's seat in the manual driving mode.