A charge control agent comprises a monoazo metals-compound including a
monoazo compound represented by the following formula [I]: ##STR00001##
and metals of a metallic element or a metalloid coordinating to the
monoazo compound. A toner for developing an electrostatic image
comprises: the charge control agent including the monoazo compound and
metals of the metallic element or the metalloid coordinating to the
monoazo compound, a resin for the toner and a colorant.