An image sensor device comprising a pair of image sensors (91a, 91b), each image sensor of the pair of image sensors (91 a, 91b) including: - first and second lighting portions (2,3,21-23) each comprising a light guide extending in a main scanning direction and irradiating an object-to-be-read with light; - a rod lens array for imaging light from the object-to-be-read; and - a light receiving portion for converting the light imaged by the rod lens array to an electric signal; wherein the first lighting portion (3, 22, 23) illuminates the object-to-be-read with normally directed light emitted in a normal direction of the object-to-be-read towards a first irradiation region of the object-to-be-read, and inclined light inclined by a predetermined angle from the normal direction of the object-to-be-read emitted towards a second irradiation region being apart from the first irradiation region in a sub-scanning direction, the normally directed light and the inclined light originating from the first lighting portion (3, 22, 23); the pair of image sensors (91a, 91b) includes a first image sensor and a second image sensor that are arranged to face each other across the object-to-be-read, the first lighting portion (3, 22, 23) included in the first image sensor and adapted to emit the normally directed light being arranged to face the rod lens array of the second image sensor, the first irradiation region illuminated with the normally directed light by the first lighting portion (3, 23) of the first image sensor being the second irradiation region arranged on an optical axis of the rod lens array of the second image sensor and illuminated with the inclined lights by the first and second lighting portion (2, 3, 21, 22) of the second image sensor, and the first lighting portion (3, 22, 23) included in the second image sensor and adapted to emit the normally directed light being arranged to face the rod lens array of the first image sensor, the first irradiation region illuminated with the normally directed light by the first lighting portion (3, 23) of the second image sensor being the second irradiation region arranged on an optical axis of the rod lens array of the first image sensor and illuminated with the inclined lights by the first and second lighting portion (2, 3, 21, 22) of the first image sensor (91 a); the light receiving portion included in the first image sensor receives reflected light information from the second irradiation region illuminated with the first and second lighting portion (2, 3, 21, 22) of the first image sensor (91 a), and transmitted light information from the first irradiation region illuminated with the first lighting portion (3, 22) of the second image sensor; and the light receiving portion included in the second image sensor receives reflected light information from the second irradiation region illuminated with first and second lighting portion (2, 3, 21, 22) of the second image sensor, and transmitted light information from the first irradiation region illuminated with the first lighting portion (3, 22) of the first image sensor (91 a). - first and second lighting portions (2,3,21-23) each comprising a light guide extending in a main scanning direction and irradiating an object-to-be-read with light; - a rod lens array for imaging light from the object-to-be-read; and - a light receiving portion for converting the light imaged by the rod lens array to an electric signal;