An image capturing device includes: a first base, including a first side edge and a second side edge opposite to each other; a first light-emitting element, located at the first side edge, for emitting a first light source to illuminate a document; a first compensator, located at the second side edge; a first sensing element, located between the first light-emitting element and the first compensator; a first transparent sheet, covering the first compensator; a second base, including a third side edge and a fourth side edge opposite to each other; a second light-emitting element, located at the third side edge, for emitting a second light source to illuminate the document; a second compensator, located at the fourth side edge; a second sensing element, located between the second light-emitting element and the second compensator; and a second transparent sheet, covering the second compensator.