1. An electron emission display device comprising: first and second substrates facing each other with a non-active area and an active area having a plurality of pixels forming a display area, the non-active area substantially surrounding the display area; a first pixel portion formed on the first substrate; a second pixel portion formed on the second substrate; and one or more alignment marks formed in the non-active area of at least one of the first and the second substrates, the alignment marks having a pattern substantially similar to that of the plurality of pixels, and the alignment marks being transparent portions formed in the non-active area.