The differential and total cross sections of photoionization of the hydrogen atom from the states 1s, 2s, 2pm, 3pm, 3dm, and 4dm are calculated for the photoelectron kinetic energy E from E = 0.01 atomic unit to E = 2.00 atomic unit. It is found that when the magnetic sublevels of the initial state are equally populated, the angular distribution of photoelectrons has the behavior[Formula: see text]and, besides 1s and 2s states, the angular distribution of photoelectrons from np state, nd state, etc. will become isotropic at a particular photoelectron kinetic energy. The angular distribution of photoelectrons for the case in which the magnetic sublevels of the initial bound state are unequally populated is also discussed.