Abstract: This invention provides a combined metering apparatus in which the convey efficiency of a target metering object from an upper-stage hopper to a lower-stage hopper is improved. For this purpose, the direction in which a bottom plate 33 of a pool hopper 25 is moved to open the lower open surface of a cylindrical body 26 and the direction in which a bottom plate 43 of a lower-stage metering hopper 35 is moved to close the lower open surface of a cylindrical body 36 are set the same. Also, the direction in which the bottom plate 43 of the metering hopper 35 is moved to open the lower open surface of the cylindrical body 36 and the direction in which a bottom plate 59 of a lower-stage timing hopper 50 is moved to open the lower open surface of a cylindrical body 51 are set the same.