To provide a cold cathode fluorescence flat lamp increasing the uniformity of light.

This cold cathode fluorescence flat lamp (CCFFL) 100 has a cavity 102, a fluorescence material 106, exhaust gas 104, at least one first electrode pair 108 and at least one second electrode pair 110. The cavity is provided with a first inner wall, a second inner wall facing the first inner wall or a second inner wall arranged on an outer wall of the cavity. The fluorescence material is arranged in an upper part of the inner wall of the cavity, and the exhaust gas is arranged in the cavity. The first and second electrode pairs are arranged in upper parts of the first and second inner walls respectively. The first and second electrode pairs are provided with a first light area 140 and a second light area 150 respectively. The first and second electrode pairs may be outside of the cavity. The first light area and the second light area do not overlap completely. So, a middle non-illumination area 160 may be compensated. Therefore, the uniformity of the light of the cold cathode fluorescence flat lamp (CCFFL) is increased.