A PDP-driving semiconductor integrated circuit includes a plurality of PDP drivers each for converting an input signal into a high-voltage pulse having an amplitude greater than that of the input signal and outputting the high-voltage pulse. The PDP-driving semiconductor integrated circuit has a function of performing sequential operation in which the PDP drivers operate at different timings and sequentially output the high-voltage pulses and a function of performing simultaneous operation in which the PDP drivers operate at the same timing and output the high-voltage pulses at a time. In each of the sequential operation and the simultaneous operation, at least one of the speed of change in voltage level of the high-voltage pulse from a low level to a high level and the speed of change in voltage level of the high-voltage pulse from the high level to the low level is controlled.