To obtain an array refractive element and an exposure device capable of enhancing the image quality of a recorded image in an exposure recorder at a low cost.

The array refraction element 36 being an element for dividing laser beam L into a plurality of beams in the sub-scan direction is arrange on the optical path of a laser beam L emitted from a plurality of semiconductor lasers LD and between an emission port of the laser beam L of a fiber array part 30 and a recording film F. The array refraction element 36 is constituted by linearly arranging a pair of refraction members each having the unit surface shape for dividing one incident laser beam it in two and emitting them so that the dividing directions of the respective laser beams coincide with each other, along the respective dividing directions.