A method for manufacturing an oriented film having a function of orienting molecules, wherein the oriented film includes a first region having a first orientation angle θ1, a second region having a second orientation angle θ2, a third region having a third orientation angle θ3, and a fourth region having a fourth orientation angle θ4, and the first orientation angle θ1, the second orientation angle θ2, the third orientation angle θ3, and the fourth orientation angle θ4 satisfy the equations: θ 2 = θ 1 + 22.5 ° or θ 1 − 157.5 °, θ 3 = θ 1 + 135 ° or θ 1 − 45 °, and θ 4 = θ 1 + 67.5 ° or θ 1 − 112.5 °, the first to fourth orientation angles are formed with respect to an arbitrary straight line parallel to the plane of the oriented film; the method comprising: irradiating the first region and the second region of a photosensitive film with first polarized light having a first intensity; characterized by irradiating the second region and the third region of the photosensitive film with second polarized light having a second intensity; and irradiating the first region, the second region, the third region and the fourth region of the photosensitive film with third polarized light having a third intensity, such that, after the irradiating with the first to third polarized lights, the first region has the first orientation angle θ1, the second region has the second orientation angle θ2, the third region has the third orientation angle θ3, and the fourth region has the fourth orientation angle θ4; wherein polarization angles of the first polarized light, the second polarized light and the third polarized light are different from each other; the three polarization angles are formed with respect to the arbitrary straight line; the three polarization angles include a first polarization angle (θa), a second polarization angle (θb), which is larger than the first polarization angle, and a third polarization angle (θc), which is larger than the second polarization angle, the polarization angle of one of the second polarized light and the third polarized light, with which the third region is irradiated, is smaller than the third orientation angle θ3, and the third intensity is lower than the first intensity and the second intensity. irradiating the first region and the second region of a photosensitive film with first polarized light having a first intensity; characterized by irradiating the second region and the third region of the photosensitive film with second polarized light having a second intensity; and irradiating the first region, the second region, the third region and the fourth region of the photosensitive film with third polarized light having a third intensity, such that, after the irradiating with the first to third polarized lights, the first region has the first orientation angle θ1, the second region has the second orientation angle θ2, the third region has the third orientation angle θ3, and the fourth region has the fourth orientation angle θ4; wherein polarization angles of the first polarized light, the second polarized light and the third polarized light are different from each other; the three polarization angles are formed with respect to the arbitrary straight line; the three polarization angles include a first polarization angle (θa), a second polarization angle (θb), which is larger than the first polarization angle, and a third polarization angle (θc), which is larger than the second polarization angle, the polarization angle of one of the second polarized light and the third polarized light, with which the third region is irradiated, is smaller than the third orientation angle θ3, and the third intensity is lower than the first intensity and the second intensity.