Image forming method

An image forming apparatus comprising an image forming body to form a toner image thereon, a developing device, a transfer device and a fixing device, and an image is formed by a process of:

• (a) developing an electrostatic latent image with a developer containing a toner to form a toner image on the image forming body,
• (b) transporting the toner image on the image forming body to a transfer region,
• (c) overlapping an image supporting body onto the toner image on the image forming body,
• (d) radiating ultrasonic waves onto the image forming body and the image supporting body by an ultrasonic radiation means with applying an electric field between the image forming body and the image supporting body to transfer the toner image onto the image supporting body, and
• (e) subjecting the toner image on the image supporting body to contact heat-fixing,
• wherein the toner is comprised of toner particles containing a resin, a colorant and a releasing agent, and the toner particles exhibiting a coefficient of variation of shape factor of not more than 16% and a coefficient of variation of number particle size distribution of not more than 27%.