A driver monitoring apparatus includes a detection section, a warning section and a changing operation section. The detection section detects at least one of a face direction and an eye direction of the driver, and generates a detection information regarding the at least one of the face direction and the eye direction detected. The warning section determines whether the driver has an inattentive drive by comparing the detection information to a reference information, and generates a warning when it is determined that the driver has the inattentive drive. The changing operation section receives an operation for changing the reference information, and changes a current reference information set before receiving the operation to a new reference information according to the operation received.
