1. A drawing apparatus comprising: an insertion portion into which a finger or toe having a nail is inserted, the insertion portion having a reference plane provided therein; a nail height detection portion that detects a distribution of height from the reference plane within a surface of the nail, on the basis of an image obtained by imaging the nail; a drawing unit that draws a nail design on a drawable area in the nail, the drawable area being defined on the basis of a distance between the nail and the drawing unit; and a design determination portion that determines a suitability of drawing the nail design on the surface of the nail by the drawing unit, on the basis of the drawable area based on the distribution by the nail height detection portion.