Abstract: A printing apparatus including at least one pallet for accommodating an original film and a mask film, at least one pallet for accommodating a spent original film and spent mask film, at least one pallet for accommodating each one of the sizes of the sensitive sheets, a pair of guide rails provided among a pallet for temporarily storing the sensitive sheet, the pallets being movable between a waiting position and a drawn position right above the exposure section provided adjacent to the waiting position by engagement between a pair of guide members mounted on each pallet and the guide rails, a pallet shifting mechanism for the reciprocating movement of each pallet between the waiting position and the drawn position along with the guide rail, and a carrier having suckers mounted on a movable plate thereof and for the reciprocating movement between the waiting position and the drawn position as well as for the vertical movement between a path for the reciprocating movement and an upper side of the exposure sect