A drive assisting apparatus includes a running state detection unit which detects a running state of a vehicle, a manipulation detection unit which detects a drive manipulation of a driver on the vehicle, a line-of-sight direction detection unit which detects a line-of-sight direction of the driver, a pattern storage unit which is stored in advance with data indicating combinations of a vehicle running state and a driver drive manipulation and a driver line-of-sight direction pattern, and a warning signal output unit. The warning signal output unit outputs a warning signal if a combination of the running direction detected by the running state detection unit, the drive manipulation detected by the manipulation detection unit, and the line-of-sight direction detected by the line-of-sight direction detection unit is different from any of the combinations of the data stored in the pattern storage unit.