A driver assistance apparatus includes a camera configured to acquire an around-view image of a view around a vehicle; an output unit; and at least one processor. The at least one processor is configured to: based on the around-view image, detect a current driving lane and determine a type of a line that delineates the current driving lane; acquire information regarding an object located in an adjacent lane next to the current driving lane; and based on the type of the line that delineates the current driving lane and based on the information regarding the object, determine whether to output a warning via the output unit.