An organic light-emitting panel includes a data line, a scan line, a voltage applying line, a switching device, an organic light emitting device and a driving device. The voltage applying line satisfies a condition expressed as.function.<.times..DELTA..times..times..times..function. ##EQU00001## wherein .DELTA.Vmax is a maximum voltage drop, `n` is a number of pixels that are electrically connected to the voltage applying line, `A` is a correction coefficient that is in a range from about 1 to about 4, .DELTA.Vdata is a voltage difference between the gray scales, and GS is a number of gray scale. According to the organic light-emitting panel, the voltage drop of the voltage applying line is reduced.