PROBLEM TO BE SOLVED: To provide an intragastric delivery checking instrument capable of further effectively checking whether or not a distal end of a tubular body such as a catheter or a string-like body such as a stylet is delivered to the inside of a stomach by simple work in a simple configuration.SOLUTION: An intragastric delivery checking instrument 10 includes: a gastric juice reactor 12 for acquiring electromotive force by using a gastric juice as an electrolytic solution an annunciator 13 for operating by the electromotive force acquired from the gastric juice reactor 12 and a transmitter (e.g., a filament 11) for transmitting the electromotive force from the gastric juice reactor 12 to the annunciator.
