PROBLEM TO BE SOLVED: To provide an important point detecting device, an important point detecting method, and an important point detecting program capable of appropriately detecting an important point in an image desired by a user. SOLUTION: A server device 10 as an important point detection device has an operation acquisition unit 133 for acquiring an enlargement operation for enlarging a part of an image and an important point detection unit for detecting a part of an image as an important point. 134 and. As a result, it is possible to appropriately detect the important points intended by the user based on the enlargement operation performed by the user. [Selection diagram] Fig. 2
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