A toner for electrostatic image development includes toner particles; and an external additive containing silica particles and polytetrafluorethylene particles, the silica particles having a compression-aggregation degree of 60% or more and 95% or less and a particle compression ratio of 0.20 or more and 0.40 or less.

A toner includes toner particles. The toner particles each include a toner mother particle containing a binder resin and an external additive attached to a surface of the toner mother particle. The external additive includes fluorine-containing particles. The fluorine-containing particles include a fluorine atom at least in surface layers thereof. The amount of the fluorine-containing particles is at least 0.10 parts by mass and no greater than 0.50 parts by mass relative to 100 parts by mass of the toner mother particles. When ultrasonication is performed, a residual amount ratio of remaining fluorine-containing particles is at least 0% by mass and no greater than 20% by mass relative to the amount of the fluorine-containing particles attached to the toner mother particles before the ultrasonication.

A non-magnetic one-component toner includes a toner particle. The toner particle includes a toner base particle and an external additive. The external additive includes a silica particle and a fluorine-containing particle. In predetermined printing in which a standard test page image defined in ISO 19752 is printed on 1000 sheets of recording media, a content Si.sub.0 of the silica particles in the toner particles before the predetermined printing and a content Si.sub.1000D of the silica particles in the toner particles in a development unit after the predetermined printing satisfy a formula (1) 0.5 Si.sub.1000D/Si.sub.01.0, and a content F.sub.0 of the fluorine-containing particles in the toner particles before the predetermined printing and a content F.sub.1000D of the fluorine-containing particles in the toner particles in the development unit after the predetermined printing satisfy a formula (2) 1.0F.sub.1000D/F.sub.01.5.