Positively chargeable toner

A positively chargeable toner comprising toner particles,

• wherein the toner particles each include a toner mother particle containing a binder resin, and an external additive adhering to a surface of the toner mother particle,
• the external additive includes, as external additive particles, silica particles having a number average primary particle diameter of at least 10 nm and no greater than 35 nm, titania particles having a number average primary particle diameter of at least 10 nm and no greater than 30 nm, and crosslinked resin particles having a number average primary particle diameter of at least 40 nm and no greater than 200 nm,
• the silica particles each include a silica base, and a first surface treatment layer present on a surface of the silica base,
• the first surface treatment layer has an alkyl group having a carbon number of 8, and an amino group,
• the titania particles each include a titania base, and a second surface treatment layer present on a surface of the titania base,
• the second surface treatment layer has an alkyl group having a carbon number of 3,
• the crosslinked resin particles each include a crosslinked resin base, and a cationic surfactant adhering to a surface of the crosslinked resin base, and
• all of the crosslinked resin particles protrude beyond the silica particles and the titania particles on surfaces of the toner particles.