The inclusion of electron‐neutral collisions in computer simulation calculations is demonstrated. Only one‐dimensional fields are considered in diodes with plane‐parallel symmetry. The method used is to change the velocities of particles in a random manner according to their probabilities of suffering a collision. The method is applied to the hard‐sphere type of collisions between electrons and neutrals. Three examples are shown, and in two of them comparison between analytical and computer simulation results are possible. Reasonably good agreements are obtained. It is demonstrated that the inclusion of electron‐neutral collisions into computer simulation procedures could be used for finding the damping effect of these collisions on the oscillatory behavior of unstable plasma diodes. With this method we can compute the large‐signal, time‐dependent characteristics of diodes at intermediate pressures in which the mean‐free path is comparable to the diode distance.