A toner including a binder resin, and a release agent, wherein the following relationships are satisfied: 2 .mu.m.ltoreq.D4.ltoreq.4 .mu.m (a) 0.05 .mu.m.ltoreq.Dw.ltoreq.0.3 .mu.m (b) Dw.ltoreq.0.075.times.D4 (c) F.ltoreq.-40.times.Dw+19 (d) F.ltoreq.20.times.Dw+5 (e) wherein D4 is a weight-average particle diameter of the toner, Dw is an average dispersion diameter of the release agent and F is a pulverizability index of the toner.