Provided is a method for feeding a granular powder (6) from a granular powder feeding hopper (11) onto an upper surface of a sheet material (4). A feeding passage (12) is disposed so as to extend downward from an outlet (26) of the granular powder feeding hopper (11) so that the lower end of the feeding passage (12) faces the upper surface of the sheet material (4) moving beneath the feeding passage (12). The feeding passage (12) is opened and closed by the open-close means (13) so that the granular powder (6) is intermittently fed from the granular powder feeding hopper (11) onto the sheet material (4).
