TONER

An object of the present invention is to provide a toner that is satisfactory in a charge rising property of the toner and contamination resistance of a charging roller, and can output an image having high density uniformity of a solid image and also having high uniformity of a halftone image, even when having been subjected to the long-term durable use in a low-temperature and low-humidity environment. A toner comprises: a toner particle comprising a binder resin; and a strontium titanate particle, wherein in TOF-SIMS measurement of the toner particle, a fragment peak derived from a boron atom and a fragment peak derived from a boron-oxygen structure are detected, and a fatty acid exists on a surface of the strontium titanate particle.