Provided is a method for producing a toner for developing electrostatic image which inhibits the generation of small diameter microparticles as a by-product in the polymerization for the toner, which includes easy or simple washing treatment (washing/filtration/dehydration), and which is excellent in productivity.The method is a method for producing a toner for developing electrostatic image comprising a suspending step of suspending a polymerizable monomer composition containing at least a polymerizable monomer and a colorant into an aqueous dispersion medium containing a dispersion stabilizer to yield a suspension wherein droplets of the polymerizable monomer composition are dispersed, and a step of subjecting the suspension to suspension polymerization in the presence of a polymerization initiator to yield colored resin particles, wherein the colorant is a metal-containing organic pigment, and when the suspension polymerization is performed, the suspension contains 0.01 to 1 part by weight of an inhibitor of small diameter microparticle production for 100 parts by weight of the polymerizable monomer.