PROBLEM TO BE SOLVED: To provide an automatic traveling support device for smoothly performing automatic traveling even if the reference position of a planned traveling route and the reference position when performing automatic traveling are different. A first vehicle body position acquisition unit that acquires a first vehicle body position detected by a first positioning device 40A, a first reference position acquisition unit that acquires a first reference position detected by a base station 700, and a vehicle body. A first map creation unit that creates a first field map based on the relative position between the first vehicle body position acquired by the position acquisition unit and the first reference position acquired by the first reference acquisition unit, and a first field map And a first automatic travel control unit that automatically travels the first work vehicle 1A based on the planned travel route L1 of the first field map. And a reference position acquisition unit that acquires a second reference position different from the first reference position, and corrects the first field map and planned travel route L1 based on the deviation between the first reference position and the second reference position. And an automatic travel map correction unit. [Selection diagram] Figure 1【課題】走行予定ルートの基準位置と自動走行を行う際の基準位置とが異なっていても自動走行をスムーズに行わせる自動走行支援装置を提供する。【解決手段】第１測位装置４０Ａで検出された第１車体位置を取得する第１車体位置取得部と、基地局７００で検出された第１基準位置を取得する第１基準取得部と、車体位置取得部が取得した第１車体位置と、第１基準取得部が取得した第１基準位置との相対位置に基づいて、第１圃場マップを作成する第１マップ作成部と、第１圃場マップに自動走行を行うための走行予定ルートＬ１の作成を行う第１ルート作成部と、第１圃場マップの走行予定ルートＬ１に基づいて第１作業車両１Ａの自動走行を行う第１自動走行制御部と、第１基準位置とは異なる第２基準位置を取得する基準位置取得部と、第１基準位置と第２基準位置との偏差に基づいて、第１圃場マップ及び走行予定ルートＬ１を補正する自動走行マップ補正部と、を備える。【選択図】図１
