PURPOSE: To obtain a toner electrostatically chargeable sufficiently and uniformly without scattering among the particles, and having stable characteristics in the system of an image developing means by incorporating a specified compd. as an electostatic charge controller in the toner.

CONSTITUTION: A toner contains as a charge controller a compd. represented by the formula shown on the right in which R1, R2 are each alkyl, aryl, or aralkyl; R3, R4 are each H, lower alkyl, or lower alkoxy; and x is an anionic functional group. The toner charge controller is incorporated alone or in combination of 2 kinds of said controllers in the toner in an amt. of 1W20wt% of a binder resin, such as polystyrenes of polyvinyl esters.