A printing apparatus comprising: a receiving means for receiving a job for executing both of one-sided printing and two-sided printing; an identifying means for identifying a first page to be subjected to the one-sided printing and second and third pages, following the first page, to be subjected to the two-sided printing included in the job received by the receiving means ; and a printing control means for performing control such that the first page identified by the identifying means is subjected to the one-sided printing and the second and third pages identified by the identifying means are subjected to the two-sided printing; the printing apparatus being characterized by a first determination means for determining whether a tabbed sheet is to be used for the job received by the receiving means; wherein the printing control means is arranged to perform first printing control such that, an image of the second page is printed prior to an image of the first page, and the image of the first page is printed between the printing of the image of the second page and an image of the third page in a case where the first determination means determined that the tabbed sheet is not to be used for the job; and wherein the printing control means is arranged to perform second printing control such that the printing of the image of the first page, the printing of the image of the second page, and the printing of the image of the third page are performed sequentially in order of the first page, the second page, and the third page, in a case where the first determination means determines that the tabbed sheet is to be used for the job. a receiving means for receiving a job for executing both of one-sided printing and two-sided printing; an identifying means for identifying a first page to be subjected to the one-sided printing and second and third pages, following the first page, to be subjected to the two-sided printing included in the job received by the receiving means ; and a printing control means for performing control such that the first page identified by the identifying means is subjected to the one-sided printing and the second and third pages identified by the identifying means are subjected to the two-sided printing; the printing apparatus being characterized by a first determination means for determining whether a tabbed sheet is to be used for the job received by the receiving means; wherein the printing control means is arranged to perform first printing control such that, an image of the second page is printed prior to an image of the first page, and the image of the first page is printed between the printing of the image of the second page and an image of the third page in a case where the first determination means determined that the tabbed sheet is not to be used for the job; and wherein the printing control means is arranged to perform second printing control such that the printing of the image of the first page, the printing of the image of the second page, and the printing of the image of the third page are performed sequentially in order of the first page, the second page, and the third page, in a case where the first determination means determines that the tabbed sheet is to be used for the job. <EOS>