A printer comprising: a head unit that is configured to move in a main scanning direction, and is provided with a plurality of ink discharging nozzles on a surface that faces a printing medium; and a movement controller that is configured to move at least one of the printing medium and the head unit so that the printing medium and the head unit move relatively to each other in a sub scanning direction that is orthogonal to the main scanning direction, wherein the plurality of ink discharging nozzles of the head unit are divided into at least: a base ink nozzle section (100;... 700) configured to discharge base ink for forming a base layer on the printing medium when the head unit moves in the main scanning direction; a superimposed ink nozzle section (100;... 700) configured to discharge superimposed ink that is to be superimposed on the base layer when the head unit passes above the base layer by moving in the main scanning direction; and a buffer section (100;... 700) configured not to discharge ink onto the base layer when the head unit passes above the base layer by moving in the main scanning direction, and the base ink nozzle section (100;... 700), the superimposed ink nozzle section (100;... 700), and the buffer section (100;... 700) are arranged such that the buffer section (100;... 700) passes above the base layer before the superimposed ink nozzle section (100;... 700) passes above the base layer, characterized in that the buffer section (100;... 700) includes a non-superimposed ink nozzle section (100;... 700) configured to discharge ink that is not to be superimposed on the base layer, and at least one of the superimposed ink nozzle section (100;... 700) and the non-superimposed ink nozzle section (100;... 700) is configured to discharge ink for forming an image. a head unit that is configured to move in a main scanning direction, and is provided with a plurality of ink discharging nozzles on a surface that faces a printing medium; and a movement controller that is configured to move at least one of the printing medium and the head unit so that the printing medium and the head unit move relatively to each other in a sub scanning direction that is orthogonal to the main scanning direction, wherein the plurality of ink discharging nozzles of the head unit are divided into at least: a base ink nozzle section (100;... 700) configured to discharge base ink for forming a base layer on the printing medium when the head unit moves in the main scanning direction; a superimposed ink nozzle section (100;... 700) configured to discharge superimposed ink that is to be superimposed on the base layer when the head unit passes above the base layer by moving in the main scanning direction; and a buffer section (100;... 700) configured not to discharge ink onto the base layer when the head unit passes above the base layer by moving in the main scanning direction, and a base ink nozzle section (100;... 700) configured to discharge base ink for forming a base layer on the printing medium when the head unit moves in the main scanning direction; a superimposed ink nozzle section (100;... 700) configured to discharge superimposed ink that is to be superimposed on the base layer when the head unit passes above the base layer by moving in the main scanning direction; and a buffer section (100;... 700) configured not to discharge ink onto the base layer when the head unit passes above the base layer by moving in the main scanning direction, and the base ink nozzle section (100;... 700), the superimposed ink nozzle section (100;... 700), and the buffer section (100;... 700) are arranged such that the buffer section (100;... 700) passes above the base layer before the superimposed ink nozzle section (100;... 700) passes above the base layer, characterized in that the buffer section (100;... 700) includes a non-superimposed ink nozzle section (100;... 700) configured to discharge ink that is not to be superimposed on the base layer, and at least one of the superimposed ink nozzle section (100;... 700) and the non-superimposed ink nozzle section (100;... 700) is configured to discharge ink for forming an image.