PURPOSE: To obtain sharp imaging at a high speed by applying magnetization of character, etc. in dot or the like to a magnetic sheet, and attracting or thermally fusing magnetic powder onto the paper which is held in tight contact with said sheet.

CONSTITUTION: A titled device consists of paper 1, an endless magnetic sheet 2, a pressing plate 3, high-density magnetizers 4, 5, a developing device 6, a sucker 7, a heater 8, etc. The sheet 2 is subjected to imaging with the magnetizer 4 which sandwiches the sheet, and the paper 1 is superposed thereon. Thermally fusible magnetic powder is sprayed onto the paper from above with the device 6 and the magnetic powder is attracted by the magnetic image on the sheet 2, by which the picture image is formed. The excess magnetic powder is sucked away with the sucker 7. The magnetic image is fused thermally and fixed with the heater 8.