An image-forming method includes a process in which a toner is supported and transported on the surface of a toner supporting member placed face to face to an electrostatic latent image-supporting member, and electrostatic latent images formed on the electrostatic latent image-supporting member is developed by the toner; and a process in which a two-component developer containing the toner and a carrier is supported on the surface of a developer-supporting member placed face to face to the toner supporting member and the toner is supplied onto the toner-supporting member. The developer includes toner particles containing a binder resin and a colorant; a carrier charging the toner particles in friction-contact with the toner particles; and reverse polarity particles and homopolarity particles respectively charged to polarity reversed to and the same polarity as polarity of the toner particles charged in friction-contact with the carrier.