Toner particles each include a toner mother particle and an external additive. The toner mother particle includes a toner core containing a binder resin and a shell layer covering a surface of the toner core. The external additive includes a plurality of external addition resin particles. The external addition resin particles are each present on a surface of the shell layer. The shell layer contains a specific vinyl resin. The toner core and each resin particle are bonded together through a covalent bond within the shell layer. A detachment rate of the resin particles is lower than 5%. The vinyl resin include constitutional units represented by formulas (1-1) to (1-3). The atomic groups X1 and X2 included in the constitutional units represented by the respective formulas (1-1) and (1-2) are each derived from N-methylol group and represented by —NHCH2O—.