A printing apparatus comprising: a printhead configured to print an image by discharging ink to a first surface as a front surface of a printing sheet and a second surface as a back surface of the printing sheet; an intermediate roller configured to feed the printing sheet towards a downstream side of a first sheet conveyance direction; a conveyance roller arranged upstream of said printhead in the first sheet conveyance direction of a printing sheet when executing a printing operation, wherein said conveyance roller is configured to convey a printing sheet fed by the intermediate roller in the first sheet conveyance direction by rotating in a first direction and to convey the printing sheet in a second sheet conveyance direction opposite to the first sheet conveyance direction by rotating in a second direction opposite to the first direction; a control unit configured to control conveying of the printing sheet in the second sheet conveyance direction at the time of a reversing operation from the conveyance roller back to the conveyance roller via a first flapper, reversing conveyance guides (23, 24), a reversing re-feed path guide, a second flapper and the intermediate roller; wherein a reversing roller is arranged in a path comprising the reversing conveyance guides (23, 24), and is configured to reverse the printing sheet conveyed by said conveyance roller rotating in the second direction and convey the printing sheet to said conveyance roller; and the control unit is configured to drive said reversing roller so as to decrease a driving speed of said reversing roller in a case where the ink discharge amount on the first surface of the printing sheet is equal to or larger than a threshold, as compared to a driving speed of said reversing roller in a case where the ink discharge amount is smaller than the threshold. a printhead configured to print an image by discharging ink to a first surface as a front surface of a printing sheet and a second surface as a back surface of the printing sheet; an intermediate roller configured to feed the printing sheet towards a downstream side of a first sheet conveyance direction; a conveyance roller arranged upstream of said printhead in the first sheet conveyance direction of a printing sheet when executing a printing operation, wherein said conveyance roller is configured to convey a printing sheet fed by the intermediate roller in the first sheet conveyance direction by rotating in a first direction and to convey the printing sheet in a second sheet conveyance direction opposite to the first sheet conveyance direction by rotating in a second direction opposite to the first direction; a control unit configured to control conveying of the printing sheet in the second sheet conveyance direction at the time of a reversing operation from the conveyance roller back to the conveyance roller via a first flapper, reversing conveyance guides (23, 24), a reversing re-feed path guide, a second flapper and the intermediate roller; wherein a reversing roller is arranged in a path comprising the reversing conveyance guides (23, 24), and is configured to reverse the printing sheet conveyed by said conveyance roller rotating in the second direction and convey the printing sheet to said conveyance roller; and the control unit is configured to drive said reversing roller so as to decrease a driving speed of said reversing roller in a case where the ink discharge amount on the first surface of the printing sheet is equal to or larger than a threshold, as compared to a driving speed of said reversing roller in a case where the ink discharge amount is smaller than the threshold.