the transporting amount of the developer constant, and it can be controlled by changing the distance between a magnet roll and the transporting amount controlling plate. However, when a toner having a sphere shape is used, the flowability of the developer is increased, and at the same time, the tapped bulk density thereof is increased. As a result, a phenomenon occurs in that the developer piles up at a part where the transportation thereof is controlled, and the transporting amount becomes unstable. While the transporting amount can be somewhat improved by controlling the surface roughness of the magnet roll and making the distance between the controlling plate and the magnet roll small, the packing phenomenon due to piling up of the developer is becomes remarkable to increase thedeveloping an electrostatic latent image of the first aspect, it is preferred that the inorganic oxide is silica.
In the toner for developing an electrostatic latent image of the first aspect, it is preferred that the colored particles have a shape coefficient represented by the following equation of 125 or less:
Shape coefficient of colored particles=(R2/S)xc2x7(xcfx80/4)xc2x7100
wherein R represents a maximum length of a diameter of the colored particles, and S represents a projected area of the colored particles.
In the toner for developing an electrostatic latent image of the first aspect, it is preferred that the external additive further contains a reaction product of metatitanic acid and a coupling agent, which has an electric resistance of 1010 xcexa9xc2x7cm or more.
In the toner for developing an electrostatic latent image of the first