Image forming optical element, image forming optical array, and image reading device

An image forming optical element, wherein a first lens to which light is input from an object, a second lens that outputs light, and a light guiding unit that leads the light input from the first lens to the second lens are integrally formed by a transparent medium,

• wherein the light guiding unit has a curved shape of a first curve portion and a second curve portion from the first lens to the second lens,
• wherein the first curve portion is provide with a first reflection face that reflects the light input from the first lens, to the second curve portion,
• wherein the second curve portion is provide with a second reflection face that reflects the light reflected by the first reflection face, to the second lens, and
• wherein the light input to the first lens travels in the transparent medium from the first lens to the second lens through the first reflection face and the second reflection face, and forms an image at magnification of erection equal-magnification after the outputting from the second lens.