PROBLEM TO BE SOLVED: To provide an image analysis device and the like capable of detecting a foot position in a person shielded and displayed by an obstacle without requiring advance information relating to a shape and an arrangement of the obstacle even when it is a photographic image by one camera.SOLUTION: An image analysis device includes: person area candidate storage means for storing a foot position in a photographic object range capable of being photographed by a camera in association with a person area candidate in which the person at the foot position is assumed to be displayed in a photographic image, and includes: person area candidate storage means in association with a plurality of different person area candidates based on a shading for one person; foreground area extraction means for extracting a foreground area from the photographic image; and person area detection means for causing a person area similar to the foreground area to be matched with the person area candidate of the person area candidate storage means. When located at the foot position corresponding to the detected person area candidate, the person is detected.SELECTED DRAWING: Figure 1
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