An image forming apparatus comprising: a display unit a selection section which is arranged to select a print target to be printed; an input section which is arranged to input a print job for printing the print target selected by the selection section; an instruction section (S316. S318) which is arranged to instruct to continue the print job; and a printing section which is arranged to execute a trial printing of printing, as a trial page, a part of the print job, the print job including a plurality of pages input by the input section, and thereafter to restart and finish the print job in response to the instruction section (S316, S318) instructing to continue the print job; wherein: the display unit is arranged to display a screen for selecting a method of selecting the trial page which is printed as trial by displaying options for selection of one of ONLY DESIGNATED PAGE, FIRST PAGE INCLUDING COLOR CHARACTER and FIRST PAGE INCLUDING IMAGE; the image forming apparatus further comprising: an extraction section which is arranged to extract, from among the plurality of pages included in the print job, according to a selected one of the displayed options, a single page as the trial page, wherein the printing section is arranged to print the page extracted by the extraction section as the trial page, and wherein, if a printing condition of the print job includes at least one of combined printing and double-sided printing, and if a page other than the trial page is to be printed on a sheet same as a page which is extracted as the trial page, the printing section prints such corresponding page together with the trial page. a display unit a selection section which is arranged to select a print target to be printed; an input section which is arranged to input a print job for printing the print target selected by the selection section; an instruction section (S316. S318) which is arranged to instruct to continue the print job; and a printing section which is arranged to execute a trial printing of printing, as a trial page, a part of the print job, the print job including a plurality of pages input by the input section, and thereafter to restart and finish the print job in response to the instruction section (S316, S318) instructing to continue the print job; wherein: the display unit is arranged to display a screen for selecting a method of selecting the trial page which is printed as trial by displaying options for selection of one of ONLY DESIGNATED PAGE, FIRST PAGE INCLUDING COLOR CHARACTER and FIRST PAGE INCLUDING IMAGE; the image forming apparatus further comprising: an extraction section which is arranged to extract, from among the plurality of pages included in the print job, according to a selected one of the displayed options, a single page as the trial page, wherein the printing section is arranged to print the page extracted by the extraction section as the trial page, and wherein, if a printing condition of the print job includes at least one of combined printing and double-sided printing, and if a page other than the trial page is to be printed on a sheet same as a page which is extracted as the trial page, the printing section prints such corresponding page together with the trial page.