An image forming method comprising: developing an electrostatic latent
image on a latent image carrier with toner to form a toner image,
transferring the toner image; and using ultrasonic vibration in the
developing step or in the transferring step is disclosed. The toner
includes toner particles that contain a releasing agent having a melting
point 40-75.degree. C., and has a number-based median diameter D50 of 3.0
to 5.0 .mu.m and a CV value of 12 to 20% in a number-based particle size
distribution and/or a mean circularity of 0.975-1.000.