To provide a monitor camera system having high detection accuracy inexpensively.

A position prediction means 7 generates predicted position information of a mobile object at present image pickup time based on position information of a mobile object at a preceding image pickup time segmented by a segmentation means 5 and specific mobile information of the monitor object stored in a storage means 3. When the position information of the mobile object in the image information picked up at present to be segmented does not correspond to the predicted position information of the mobile object predicted by the position prediction means 6, the mobile object is excluded from the consecutively monitored object by a cross reference means 7.