To provide an endoscope cleaning device whose cleaning performance and rinsing performance can be enhanced.

In the endoscope cleaning device including a cleaning tank 20 for housing an endoscope 200, a bottom surface part 20D of the cleaning tank 20 is formed slopewise so as to descend toward the right side in the lateral direction of the cleaning tank, a delivery port 42 is formed in the inside surface part of the cleaning tank 20 on the right side in the lateral direction, a water supply port 43 is formed in the bottom surface part 20D of the wash tank 20 on the right side in the lateral direction, and a partition wall 20M is formed between the delivery port 42 and the water supply port 43 on the bottom surface part 20D of the cleaning tank 20.