A product information providing apparatus for providing, via a network, product information for supporting operations of a product, comprises an electronic product information storage that stores electronic product information which contains a group of hierarchized files having a file format browsable through a Web browser; a table holder that holds an event table in which an event indicating a change in the state of the product is associated with address information of the product information corresponding to the event; an event detector that detects occurrence of the event; an address information acquisition unit that acquires address information corresponding to the event detected by the event detector by referring to the table holder; an accessing unit that accesses the corresponding electronic product information based on the address information acquired by the address information acquisition unit; and a display that displays the electronic product information accessed by the accessing unit.