To provide a method for producing a toner for developing an electrostatic charge image, which is capable of producing toner host particles in good yield and which is excellent in image characteristics, image quality, scratch resistance of a developing device and toner consumption, and a screen device which is capable of screening continuously without clogging.A method for producing a toner for developing an electrostatic charge image, which comprises a step of screening a dispersion of toner host particles by a screen, characterized in that when the above step is carried out, Y≦{1/(M2+r2+2Mr)}×108×0.6 is satisfied where Y is the number of particles (number/cm2) existing on the screen and having sizes of at least the mesh size of the screen, M is the mesh size (μm) of the screen, and r is the diameter (μm) of wire constituting the screen; a screen device characterized in that the screen is one wherein the shape of the minimum opening unit to let particles pass therethrough, changes from the stationary state by vibration in the screening step; a screen device characterized in that the screen is one to which substantially no tension is applied; and a method for producing a toner for developing an electrostatic charge image, which employs such a screen device.