Abstract: The in-vehicle information processing device includes: a vehicle information acquisition unit for acquiring vehicle information including update information of software mounted in a vehicle and charge information of a battery, from an associated ECU, and determining a process not allowing the vehicle to travel and a recommended return time which is time when the vehicle is allowed to travel; a user action state estimation unit for acquiring a position of the vehicle and a user operation condition from an associated ECU, and estimating a user action state; and a user notification information generation unit for generating user notification information including information for assisting the user in action determination, on the basis of the process not allowing the vehicle to travel and the recommended return time, and the user action state.