To keep balance between suppression of vehicle behavior change and quick changeover of an operation support mode.SOLUTION: A vehicular operation support control device 100 is provided. The operation support control device 100 comprises: an acquisition part 103 which acquires of a running state of a detected vehicle and vehicle running environment; and a control part 101, P1 which decides an operation support mode according to at least any one of the acquired running state and running environment, and causes an operation support part to execute operation support according to the decided operation support mode. When the operation support mode is changed, the control part 101, P1 alleviates change of the operation support mode during a predetermined first alleviation period.SELECTED DRAWING: Figure 2
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