A collected data providing apparatus and a portable data collecting terminal capable of collecting valuable effective data from object of data collection. When a server receives a data-collection request from a data collection requester's terminal, the server examines whether or not there is a data collector with a terminal in the vicinity of a place of data collection included in the request. If there is, the server sends a data collection request to the portable terminal, which receives the request, collects data on the place at the request, and then sends the server the collected data. The server then delivers this collected data to the data collection requester's terminal (FIG. 1).