A printer for printing an image on a sheet stored in a rolled shape, includes a sheet holder by which the sheet in the rolled shape is rotatably held and including at least one side plate movable in a width direction of the sheet and contacting a side surface of the sheet, a printing head by which an image is printed on the sheet that has been conveyed from the sheet holder, a buffer unit between the sheet holder and the printing head and including a plate-shaped member that is connected to an elastic member that generates an elastic force by which the conveyed sheet is pressed, and an adjusting unit by which the movable side plate and the buffer unit is connected such that the elastic force varies depending on a location of the side plate.

A printer for printing an image on a sheet stored in a rolled shape, includes a sheet holder by which the sheet in the rolled shape is rotatably held and including at least one side plate movable in a width direction of the sheet and contacting a side surface of the sheet, a printing head by which an image is printed on the sheet that has been conveyed from the sheet holder, a buffer unit between the sheet holder and the printing head and including a plate-shaped member that is connected to an elastic member that generates an elastic force by which the conveyed sheet is pressed, and an adjusting unit by which the movable side plate and the buffer unit is connected such that the elastic force varies depending on a location of the side plate.