In the conventional printing application, it is impossible to easily overview which image is printed in which page, so that there is a drawback that a user is required to perform the printing while imagining printing result. An idea for more quickly providing the printing result at the same time when the printing is performed by simple operation has not been sufficiently made. In order to solve the problems, a printing apparatus includes decoding means for, before the an instruction is given, decoding the image to be printed in at least a first sheet with the layout selected by layout selecting means among images selected by image selecting means and printing controlling means for effecting the printing of image data decoded by the decoding means, and a printing method includes steps to be executed in the printing apparatus.