To provide a nail printing apparatus which causes no trouble on user's health and enables a user to easily enjoy nail print actively emitting aroma without troubling the user, and to provide a method for controlling printing.

The nail printing apparatus takes a photo of a finger to acquire a fingernail image, extracts a nail area from the fingernail image, prints a nail design image 75 on the nail part T of the user or on a nail chip sheet 7 for creating a nail chip 70 applied to the nail part T of the user to have an outer shape fit in that of the nail area extracted from the fingernail image to form a nail design image layer 92, and then prints flavor components containing aroma components to be superposed on the nail design image layer 92 to form a flavor component layer 94.