1. A face image detection device, comprising: a judgment area determining unit operable to determine, in an inputted image, a first judgment area for judging existence of a face image in a front view direction and a second judgment area for judging existence of a face image, the face image to be judged in the second judgment area facing one of predetermined directions different from the front view direction; and a face judgment unit operable to judge existence of a face image in the first judgment area, the face image having a size greater than a first predetermined size, and to judge existence of a face image in the second judgment area, the face image having a size greater than a second predetermined size, as defined correspondingly to the second judgment area, wherein said judgment area determining unit determines a ratio of the first judgment area to the inputted image and a ratio of the second judgment area to the inputted image, according to respective directions of the front view direction and the predetermined directions.