There is provided a toner which exhibits a quick rise of charging and excellent cleaning property and which can form high-quality images having high definition and high density. A toner envelope degree of the toner falls in a range of from 2.0 to 3.0, which degree is obtained by calculation of [(L1-L2)/L2].times.100 wherein L1 represents a circumference length of a projection image of toner particles containing binder resin and a colorant, and L2 represents a length of envelope of the projection image of the toner particles.