An endoscope cleaning/disinfecting apparatus connection tool includes: a fluid supply apparatus connection portion 5 a first fluid passage portion 3 and a second fluid passage portion 4 each including an end that is in communication with the fluid supply apparatus connection portion 5, and allowing a fluid supplied from the fluid supply apparatus 100 to pass through an endoscope connection portion 6 including a first discharge portion 3t and a second discharge portion 4t to be connected to an opening portion 17k that is in communication with a conduit 18 included in the endoscope 10, the first discharge portion and the second discharge portion being provided at respective other ends of the first fluid passage portion 3 and the second fluid passage portion 4, the first discharge portion 3t being inserted into the opening portion 17k and discharging the fluid passed through the first fluid passage portion 3 to an inside of the conduit 18, the second discharge portion 4t being arranged at a circumference of the opening portion 17k and discharging the fluid passed through the second fluid passage portion 4 to the circumference of the opening portion 17k.
