A printing apparatus comprising: a head including a recording material ejection nozzle configured to eject a holographic recording material in dots onto a transparent sheet as a support; a hologram recording optical system configured to emit a beam of laser light onto the holographic recording material ejected on the transparent sheet by the recording material ejection nozzle to record interference fringes therein; a mirror, and a moving means (20,30) configured to move the transparent sheet relative to the recording material ejection nozzle and the hologram recording optical system, wherein the beam of laser light enters the transparent sheet from a first side, and laser light reflected off the mirror enters the transparent sheet from a second side, characterized in that the head includes the hologram recording optical system, the moving means comprises a scanning drive unit configured to move the recording material ejection nozzle and the hologram recording optical system relative to the transparent sheet, and conveyor means configured to move the transparent sheet relative to the recording material ejection nozzle and the hologram recording optical system, wherein the scanning movement is perpendicular to the conveying movement, the mirror is disposed opposite the head with respect to the transparent sheet, wherein the beam of laser light enters the transparent sheet from the first side, passes through the transparent sheet, and is reflected off the mirror, while the thus-reflected beam enters the second side of the transparent sheet to, in use, record interference fringes between the counter-propagating beams in the holographic recording material a head including a recording material ejection nozzle configured to eject a holographic recording material in dots onto a transparent sheet as a support; a hologram recording optical system configured to emit a beam of laser light onto the holographic recording material ejected on the transparent sheet by the recording material ejection nozzle to record interference fringes therein; a mirror, and a moving means (20,30) configured to move the transparent sheet relative to the recording material ejection nozzle and the hologram recording optical system, wherein the beam of laser light enters the transparent sheet from a first side, and laser light reflected off the mirror enters the transparent sheet from a second side, characterized in that the head includes the hologram recording optical system, the moving means comprises a scanning drive unit configured to move the recording material ejection nozzle and the hologram recording optical system relative to the transparent sheet, and conveyor means configured to move the transparent sheet relative to the recording material ejection nozzle and the hologram recording optical system, wherein the scanning movement is perpendicular to the conveying movement, the mirror is disposed opposite the head with respect to the transparent sheet, wherein the beam of laser light enters the transparent sheet from the first side, passes through the transparent sheet, and is reflected off the mirror, while the thus-reflected beam enters the second side of the transparent sheet to, in use, record interference fringes between the counter-propagating beams in the holographic recording material