To provide a ticket issuing device capable of instantaneously purchasing the reserved seat ticket of an event by the operation of a purchaser himself.

This ticket issuing device is provided with a client 1 and a server 2 connected through a line with the client 1 so that an event ticket can be issued on the client 1 side. The client 1 is provided with a communicating means with the server 2, an instructing means for instructing the server 2 to read the information of the event or the like, a receiving means for receiving the information of the event or the like, a display means for displaying the information of the event or the like, a selecting means for selecting the event and the vacancy, and an event ticket issuing means. The server 2 is provided with a storage means 2b for storing information of the event or the like, a communicating means with the client 1, a means 2a for reading the information of the event or the like from the storage means 2b, and a means 2a for updating the vacancy information of the storage means 2b according to the ticket issue information of the client 1.