An in-vehicle apparatus includes: a check direction determination unit determining a check direction for which the driver of an own vehicle needs a checking action for checking the safety based on a traveling direction of a roadway adjacent to a stall and an unparking direction; a direction information acquisition unit acquiring at least one of the line of sight or the facing direction of the face of the driver; a check occurrence determination unit setting a detection range of the line of sight based on the check direction, and determining whether or not at least the one is within the detection range so as to determine occurrence of the checking action; and a notification control unit controlling a display unit, a speaker, or a vibrator to execute a notification action when the check occurrence determination unit determines that the checking action has not occurred.