Disclosed is a printing apparatus including an image input unit, a first image narrowing unit, and gives a high weight for image data photographed during a time period in which the number of shots is large, a second image narrowing unit, and gives a high weight for image data photographed during a time period in which the number of shots is large, a weight synthesis unit, a layout decision unit, an image data extraction unit, an image assignment unit, an image color determination unit, and an additional information adjustment unit. The first image narrowing unit counts a group of a plurality of image data photographed at a predetermined time under a specific setting as one group including a number of shots, and calculates the number of shots for each predetermined time period based on the shooting date and time of the image data.