Housing and cold cathode fluorescent flat lamp using the same

A housing and a cold cathode fluorescent flat lamp using the same are provided. The cold cathod fluorescent flat lamp comprises the housing, at least one pair of electrodes, a fluorescent substance and a discharge gas. The housing comprises a cavity shell, a plurality of spacers and a hardening paste. The spacers are disposed inside the cavity shell. The height error of the spacers is bigger than 0.01 mm and between 1/20 to 1/4 of the height of the spacers. The hardening paste is disposed between the spacers and the cavity shell. The pair of electrodes is disposed inside or outside the cavity shell. The fluorescent substance is disposed on the inner wall of the cavity shell. The discharge gas is disposed inside the cavity shell.