A running control system of the present invention includes a follow-up intention detection device for detecting an operation of requesting a follow-running control by the driver, and a running control device for aborting the follow-running control with respect to the preceding vehicle based on a signal from the braking operation detection device. If an operation by the driver for requesting the follow-running control is detected by the driver while the braking operation by the driver is detected by the braking operation detection device, the running control device starts the follow-running control after the end of the driver's braking operation.