Abstract: CAVALLO1 has considered the possibility that estimates of distances to pulsars based on the dispersion measures (DMs) are unreliable and has introduced a tentative period-luminosity relation, L=1.8×1028 p−1·35, for pulsars. He has used this relation to compute the distances to various pulsars and, on this basis, has shown that the known pulsars are situated within 1.5 kpc of the Sun and that they tend to be confined to a single spiral arm. This distribution is different from that obtained when distances are derived from the DMs—in this case the pulsars seem to be distributed in two spiral arms.