In order to provide technique which reduce the positional shift of recording in the conveyance direction of a printing medium, a printing apparatus comprises: a conveyance unit for conveying the printing medium by rotating a roller; a detection unit for detecting a conveyance amount of a printing medium conveyed by rotating the roller in less than one rotation; an acquisition unit for acquiring a conveyance amount of the printing medium corresponding to a predetermined rotation amount of the roller by detecting the conveyance amount a plurality of times; and a setting unit for setting a rotation amount of the roller when forming an image on the printing medium based on a conveyance amount of a printing medium corresponding to the acquired predetermined rotation amount of the roller.