In the yellow toner of the present invention, it is possible to optionally add a lubricant such as a fatty acid metal salt (e.g., zinc stearate and aluminum stearate) or fine fluorine-containing polymer powder (e.g., fine powders of polytetrafluoroethylene, polyvinylidene fluoride and a tetrafluoroethylene-vinylidene fluoride copolymer), and a electroconductivity-imparting agent such as tin oxide