An image forming apparatus includes a receiving unit, a paper information storing unit, an initializing unit, a paper information comparing unit, a temporary stopping unit, and a printing unit. The receiving unit receives print jobs. The paper information storing unit stores paper information preset in the printed page. The initializing unit initializes the paper information stored in the paper information storing unit during a certain period. The paper information comparing unit compares the paper information of the page to be printed in the print job with the stored paper information. The temporary stopping unit temporarily stops printing according to the result of the comparison. The printing unit prints the print data of the page to be printed in the case that the paper information of the page to be printed is the same as the stored paper information or the stored paper information has been initialized.