Whether a patient actually takes medicine or not is traced and recorded. The used state of a packaged object is traced and recorded. Specifically, a passive wireless tag and an antenna are attached to a packaged object management device. The passive wireless tag is disposed on the package containing a packaged object, and power is generated in the passive wireless tag by electromagnetic induction (contactless power transmission) through a radio wave from a reader, and the passive wireless tag receives/transmits a radio wave to transmit/receive information. The antenna is disposed in a region (take-out opening) for taking out the packaged object from the package so that the antenna can be broken when the packaged object is taken out and is used to inform the passive wireless tag of the take-out of the packaged object. The gap between the boundary of the region (take-out opening) for taking out the packaged object and the antenna is smaller than the minimum width large enough to take out the packaged object.
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