Ultra high-speed data transmission on a backplane suffers from inter-symbol interference (ISI), which degrades bit error rate (BER) performance. In order to reduce ISI, an adaptive equalizer or a pre-emphasis filter is placed on either a receiver or a transmitter side. Although adaptation methods for an equalizer have been introduced, those for a pre-emphasis filter have scarcely been reported. This paper proposes a structure of an adaptive pre-emphasis filter and its adaptation method to have optimal coefficients corresponding to channel.