An electro-optical device includes a light source, a light guiding plate, a first displaying panel, and a second displaying panel, in which the light guiding plate has an inclined portion which becomes gradually thicker as it becomes nearer the light source, the second displaying panel is arranged on a first side of the light guiding plate, on which the inclined portion is disposed, and the first displaying panel is arranged on a second side of the light guiding plate, on which the inclined portion is not disposed, and an end portion of a displaying region of the second displaying panel is arranged nearer the light source than an end portion of a displaying region of the first displaying panel.