The present invention provides a magnetic toner which is hardly influenced
by an environment, and with which an image with high quality and
excellent resolution can be stably even under low humidity. In the
magnetic toner of present invention: I) a ratio of an iron element
content to a carbon element content present on the toner particle surface
is less than 0.0010; II) 50 number % or more of toner particles satisfy a
relationship of D/C.ltoreq.0.02 (C: projected area diameter of toner
particles, D: minimum value for a distance between a magnetic iron oxide
fine particle and the toner particle surface); and III) 40-95 number % of
toner particles satisfy a structure where 70 number % or more of the
magnetic iron oxide fine particles in the respective toner particles are
present up to a depth of 0.2 time as far as C from the toner particle
surface.