DRIVING SUPPORT DEVICE FOR VEHICLE, DRIVING SUPPORT METHOD FOR VEHICLE, AND NON-TRANSITORY STORAGE MEDIUM

A driving support device (10) includes: a front camera (32) configured to acquire image data; and a controller (15) configured to execute driving support control for supporting driving by a driver of a vehicle (100) when the controller (15) determines that a specific display object exists in front of the vehicle (100) based on the image data. The driving support control is control executed depending on the specific display object. The controller (15) is configured to determine whether a conforming operation is being executed by the driver. The controller (15) is also configured to execute, as the driving support control, control having a higher support level indicating a degree of influence on the driver when the controller (15) determines that the conforming operation is not being executed, as compared with a case where the controller (15) determines that the conforming operation is executed.