DRIVING SUPPORT DEVICE

To suppress collision of a rear vehicle with an obstacle existing ahead of a travel lane of an own vehicle while suppressing collision of the own vehicle with the obstacle.SOLUTION: A driving support device (10) mounted in an own vehicle includes: an obstacle detection section (11) which detects an obstacle existing ahead of a travel lane on which the own vehicle travels; a rear vehicle detection section (12) which detects a rear vehicle traveling behind the own vehicle; an operation control section (13) which determines one operation of a lane change and steering and braking in the travel lane as an avoiding operation, and makes the own vehicle execute the avoiding operation and avoid the obstacle; and a collision estimation section (14) which estimates the presence or absence of a collision of the rear vehicle with the obstacle when the own vehicle is made to avoid the obstacle by one of avoiding operations of the lane change and steering. The operation control section determines the avoiding operation on the basis of the estimated presence or absence of the collision.SELECTED DRAWING: Figure 1 【課題】自車両の走行車線の前方に存在する障害物に自車両が衝突することを抑制しつつ、障害物に後方車両が衝突することを抑制する。【解決手段】自車両に搭載される運転支援装置（１０）は、自車両が走行する走行車線の前方に存在する障害物を検出する障害物検出部（１１）と、自車両の後方を走行する後方車両を検出する後方車両検出部（１２）と、車線変更と走行車線内での操舵と制動とのうちのいずれか一つの動作を回避動作として決定して自車両に実行させて、自車両に障害物を回避させる動作制御部（１３）と、車線変更と操舵とのうちのいずれか一方の回避動作によって自車両に障害物を回避させた場合における、後方車両の障害物への衝突の有無を推定する衝突推定部（１４）と、を備え、動作制御部は、推定された衝突の有無に基づいて回避動作を決定する。【選択図】図１