To provide a determinate quantity loading method for powder and grains to efficiently load powder and grains onto a bulk vehicle for powder-and-grain transportation while providing sufficient weighing accuracy even when fluctuation arises in mixing ratio of powder and grains and in bulk density of the powder and grains in pneumatic transportation, as to a powder-and-grain transportation course provided with no weighing means.

This determinate quantity transportation method for powder and grains in a course provided with no weighing means in the transportation course is for taking out powder and grains stored in a storage place by a prescribed amount from the storage place to pneumatically transport them to an aimed housing body that is the destination of transportation. The pressure of a blower used for the pneumatic transportation is time-integrated to control the amount of powder and grains transported based on the integrated value.