1. An event queue managing device for managing a queue of an event when an application operable in an application execution environment carries out processing upon occurrence of the event, the event queue managing device comprising: queue managing means for storing a generated event in a queue and managing the queue of the event; event classification detection means for detecting an event classification of the event whose queue is managed by the queue managing means; stop state detection means for detecting a stop state of the application execution environment; and event deletion means for retrieving, when the stop state of the application execution environment is detected by the stop state detection means, according to the event classification of the event detected by the event classification detection means an unnecessary event from events stored in the queue by the queue managing means and deleting the unnecessary event.