A display device includes: a display panel which display an image with light and has a curvature; a light source which generates and emits the light to the display panel; a light guide plate which guides the light emitted from the light source to the display panel, the light guide plate having a curvature and defining a light incidence surface thereof through which the light is incident; a circuit board which faces the light incidence surface of the light guide plate and on which the light source is mounted; and an alignment member which is between the circuit board and the light guide plate and aligns the light source with the light incidence surface of the light guide plate.