A magnetic toner which is excellent in the low temperature fixability and the anti-offset properties is disclosed. The binder resin of the toner comprises a non-crosslinked styrene polymer, a non-crosslinked styrene copolymer or a mixture of these, and a polyolefin, wherein; the binder resin has, in its molecular weight distribution pattern measured by gel permeation chromatography (GPC), at least one maximal point (peak) in each region of a low molecular weight of from 5,000 to 20,000 and of a high molecular weight of from 200,00 to 1,000,000, where a height H1 of a maximum peak in the low molecular weight region, a height H3 of a maximum peak in the high molecular weight region and a height H2 of a minimal point between both of said peaks satisfy the relationship H1:H2:H3 of 3-25:1:1.5-12; and has a weight average molecular weight Mw and a number average molecular weight Mn in a value Mw/Mn of from 15 to 80.