A printing apparatus comprising: a transport portion (20, 31, 32, 40) which transports a recording medium in a first direction (Df); a transport position output portion which outputs a transport position of the recording medium by the transport portion; a printing portion which prints an image on the recording medium; a mark detection portion (Sm) which detects a mark in a detection region among a plurality of marks which are aligned in the first direction and are provided on the recording medium; a storage portion which stores as a reference value (Vr) an output value of the transport position output portion when a first mark, that corresponds to a position at which printing of the image is started, is at a predetermined position (Pd) with respect to the detection region among the plurality of marks; and a control portion which performs printing processing of printing the image on the recording medium by controlling the printing portion to start the printing of the image after controlling the transport portion to transport the recording medium in the first direction from a state where the first mark is positioned further on an upstream side in the first direction than the detection region, wherein the control portion controls a start timing of the printing of the image by the printing portion based on a timing at which the mark detection portion detects the mark, and the control portion controls the mark detection portion to detect the mark after confirming that the first mark reaches a predetermined range from the detection region based on comparison of an output value of the transport position output portion and the reference value with each other, in the printing processing. a transport portion (20, 31, 32, 40) which transports a recording medium in a first direction (Df); a transport position output portion which outputs a transport position of the recording medium by the transport portion; a printing portion which prints an image on the recording medium; a mark detection portion (Sm) which detects a mark in a detection region among a plurality of marks which are aligned in the first direction and are provided on the recording medium; a storage portion which stores as a reference value (Vr) an output value of the transport position output portion when a first mark, that corresponds to a position at which printing of the image is started, is at a predetermined position (Pd) with respect to the detection region among the plurality of marks; and a control portion which performs printing processing of printing the image on the recording medium by controlling the printing portion to start the printing of the image after controlling the transport portion to transport the recording medium in the first direction from a state where the first mark is positioned further on an upstream side in the first direction than the detection region, wherein the control portion controls a start timing of the printing of the image by the printing portion based on a timing at which the mark detection portion detects the mark, and the control portion controls the mark detection portion to detect the mark after confirming that the first mark reaches a predetermined range from the detection region based on comparison of an output value of the transport position output portion and the reference value with each other, in the printing processing.