The object is to provide a magnetic toner with which toner scattering,
toner spent to carrier, development of scratch streaks by the magnetic
brush on the photoreceptor drum can be prevented for a prolonged period
and a good image characteristic (in image density and background fogging)
can be maintained for a prolonged period, and an image forming method
using the magnetic toner. A two-component developer comprising carriers
and toner which contains magnetic particle at least in a binder resin
thereof, the magnetic particle being of basically polyhedral shaped
shape, vertexes and edges of said polyhedral shape being curved surfaces,
said shape having peripheral parts taken as straight lines in a projected
image thereof, saturation magnetization of said toner in a magnetic field
of 79.6 kA/m being 4.0 to 15.0 Am.sup.2/kg, is prepared, and the toner
retaining members (carriers) bearing at least said magnetic toner to
which electric charge is injected are allowed to face a latent image
retaining member and an electrostatic latent image on said latent image
retaining member is developed with said magnetic toner.