Ticket checking device and financial self-service equipment

The utility model discloses a ticket checking device, which is used for detecting paper money in a medium transmission channel and comprises a photoelectric transmitting tube, a photoelectric receiverand at least one flexible optical fiber ribbon, wherein the photoelectric receiver and the photoelectric transmitting tube form a detection optical path penetrating through the medium transmission channel to be detected; the flexible optical fiber ribbon is provided with a light receiving end used for receiving light, a light emitting end used for guiding the light out, and an optical fiber bodyextending from the light receiving end to the light emitting end. When paper money passes through the medium transmission channel; the paper money blocks an optical signal propagation line; an opticalsignal transmitted by the photoelectric transmitting tube cannot be transmitted to the photoelectric receiver; at this time, it can be detected that banknotes are located in the medium transmission channel. Due to the fact tha