A paper hold-down flap (18) is provided above a position near a rear end section of a paper table (7) to which sheets of paper are continuously supplied from a copy machine etc. The paper hold-down flap is switched by a solenoid (17) between an upper initial position and a paper hold-down position. After paper is taken into the paper table, the paper hold-down flap is driven to the paper hold-down position to hold a rear end section of the paper (P), and at the time of the next paper taking in, the paper hold-down flap is returned to the initial position to make the flap recede from a paper path. Paper clogging caused by a lift of the paper can be prevented by holding down the paper on the paper table until immediately before the next paper is taken in.