A model of charge transport in fluidized bed electrodes, based on the model of Newman and Tobias, is proposed. It explains the dynamic behaviour of these particulate electrodes in terms of a.c. impedance thanks to a description based on a transmission line. In the case of gold beads in 1 M NaOH solutio, the impedance related to the mean contact between the particles, the interfacial impedance of the particle-solution and the solution resistivity can be obtained.