The present invention is to provide a method of producing a non-magnetic one-component toner for developing an electrostatic image which is well-balanced between shelf stability and fixing ability at low temperature and has a good charge property so that printing performance is excellent from the viewpoint of hardly producing printing soiling such as fogs or the like. The method of producing the non-magnetic one-component toner for developing an electrostatic image comprising the steps of: a suspension process (A) of obtaining a suspension having droplets of a polymerizable monomer composition for core dispersed by suspending the polymerizable monomer composition for core comprising at least a polymerizable monomer for core and a colorant in an aqueous dispersion medium containing a dispersion stabilizer; a core particle forming process (B) of forming a core particle comprising a binder resin and a colorant by suspending and polymerizing the suspension in the presence of a polymerization initiator; and a shell layer forming process (C) of forming a shell layer to cover the core particle by adding polymerizable monomers for shell to a core particle dispersion liquid having the core particles dispersed in an aqueous dispersion medium followed by polymerization in the presence of a polymerization initiator, wherein, in the process (C), 0.1 to 10 parts by weight of a polymerizable monomer for shell containing at least a polymerizable tertiary amino compound having a structure represented by the following Chemical formula 1 with respect to the polymerizable monomer for core of 100 parts by weight is added to the core particle dispersion liquid as the polymerizable monomers for shell and polymerized, thereby, the shell layer comprising a polymer having a glass transition temperature from 70 to 120° C. is formed: wherein, R1, R2, and R3 independently represent hydrogen or an alkyl group having 1 to 4 carbon atoms respectively.