The invention discloses an electron emission display device capable of achieving a high efficiency. In one embodiment, the electron emission display device includes a first substrate, a second substrate facing the first substrate, an electron emission unit formed on the first substrate, and a light emission unit having a phosphor layer patterned on the second substrate. In this embodiment, when an area of an electron beam spot of an electron beam emitted from the electron emission unit and landed on the phosphor layer is indicated by A, and an area of the phosphor layer corresponding to the electron beam spot is indicated by B, the areas A and B satisfy: 0.9<=A/B<=1.4. |