To provide a magnetic toner which has superior low-temperature fixing performance and pressure roller anti-staining properties even in various forms of use, has been kept from image defects such as image non-uniformity even during long-time image reproduction and can achieve high-level image quality. In a magnetic toner having toner particles containing at least a binder resin and a magnetic material, the activation energy Ea (kJ/mol) that is determined from a shift factor aT.sub.120 in a master curve of the toner, prepared when 120.degree. C. is set as reference temperature, and the activation energy Eb (kJ/mol) that is determined from a shift factor aT.sub.150 in a master curve of the toner, prepared when 150.degree. C. is set as reference temperature, satisfy Expression (1), and the Ea is 110 kJ/mol or less: 1.00.ltoreq.Ea/Eb<1.20 (1).