A toner comprises toner particles comprising at least a binder resin, a colorant,
and a sulfur-containing resin, in which the toner particles comprise the sulfur-containing
resin so as to satisfy a relation of; 0.50IS/TS0.95
where TS denotes a content of sulfur in the toner particles, and IS
denotes a content of sulfur in isopropyl alcohol insoluble components of
the toner particles, whereby it is possible to obtain a high quality image having
an excellent developing resistance regardless of the surrounding conditions and
a uniform charge amount distribution regardless of processing speed.
