To provide a vehicle traveling control device that secures traveling safety when a driver performs inattentive driving while enabling smooth road traffic promotion.

The vehicle traveling control device includes: an inattentive state determination means 30a that determines the inattentive state of the driver from the face orientation of the driver of the own vehicle; a preceding vehicle detection means 31 that detects the information of a preceding vehicle that precedes the own vehicle; a traveling control means 10 that controls the output of the traveling drive source of the own vehicle corresponding to the acceleration and deceleration request of the driver; and a rear-end collision determination means 30 that determines the rear-end collision possibility of own vehicle to the preceding vehicle from the detection information of the preceding vehicle detection means 31. The traveling control means 10 corrects the output of the traveling drive source corresponding to the acceleration and deceleration request to the control side when it is determined that the driver is in the inattentive state by the inattentive state determination means 30a, and when it is determined that there is a rear-end collision possibility of the own vehicle to the preceding vehicle by the rear-end collision determination means 30.