The invention provides an optical path adjusting unit and a display device. The optical path adjusting unit, for adjusting light rays from different directions to transmit in approximately the same direction, comprises a light converging part, a reflective part and a light scattering part. The light converging part and the light scattering part form a hollow space, and the reflective part is disposed within the hollow space and connected to the middle of the light converging part and the middle of the light scattering part to divide the hollow space into two parts. The light converging part is used to converge the light rays from different directions; the reflective part is used to reflect the converged light rays onto the light scattering part, and the light scattering part is used to transmit the light rays reflected thereon by the reflective part out in approximately the same direction.