An image searching device including a database, a user interface, a search unit, and an output unit. The search unit includes a data management unit configured to manage data on a model to be searched and acquired from the database and create an image to be displayed on a screen of the user interface; a determination unit configured to determine and extract parts each having a boundary included in a closed region as candidate parts; a part selection unit configured to display single images of the candidate parts on the screen of the user interface to enable selection of a target part; and an image switching unit configured to create data on a part emphasis frame and switch the screen displayed on the user interface from the single images of the candidate parts to a full image in which the target part is highlighted with the part emphasis frame.