A picture processing apparatus is disclosed which processes pictures showing subjects wearing devices each assigned identification information. The picture processing apparatus includes: an acquiring mechanism acquiring a first picture sequence formed by the pictures showing the subjects wearing the devices, and a time series of the identification information assigned to the devices; and a clustering mechanism which, based on how the time series acquired by the acquiring mechanism is linked according to the identification information, links together scenes constituting the first picture sequence, the scenes having been picked up at corresponding points in time.