1. A target selection apparatus that selects a target from image data including a plurality of targets, comprising: a display control unit configured to display an image corresponding to the image data on a display unit; a drawing unit configured to draw a drawing line on the image displayed on the display unit; and a selection unit configured to select the target included in the image data based on the drawing line drawn by said drawing unit, wherein in response to the drawing line drawn by said drawing unit becoming a closed curve, the target selected by said selection unit is determined.