It is an object of the present invention to provide a toner capable of being fixed at low energy and forming an image with high resistance to external forces, such as rubbing and scratching.The object is achieved by a toner including toner particles that contain a binder resin and a colorant, a sea-island structure including a sea portion composed of the crystalline resin C serving as a main component and island portions composed of the amorphous resin A serving as a main component is observed at the observation of a cross section of each of the toner particles.