A method of producing an electrostatic image developing toner comprising toner particles comprising a binder resin containing at least a non-crystalline polyester resin having a crosslinking structure and a crystalline polyester resin, the method comprising the steps of (a-1) preparing a crystalline polyester resin particle aqueous dispersion liquid; (a-2) preparing a polymerizable unsaturated non-crystalline polyester resin aqueous dispersion liquid; (b) preparing crosslinking non-crystalline polyester resin particles by adding a radical polymerization initiator to the aqueous dispersion liquid of particles containing the non-crystalline polyester resin having a polymerizable unsaturated bond; (c) preparing core particles by aggregating at least the particles containing the crystalline polyester resin in an aqueous medium; and (d) preparing a shell layer containing the non-crystalline polyester resin having a crosslinking structure by fusing the particles containing the non-crystalline polyester resin having a crosslinking structure on surfaces of the core particles in an aqueous medium.