The present invention has an object to measure lymphatic pressure with more safety and ease at lower cost. To achieve this, a lymphatic pressure-measuring system 1 includes: a manchette 11 fitted on a vital observation portion a measurement unit 13 that measures and outputs pressure of the manchette 11 an infrared camera 21 that detects fluorescence emitted from fluorescent dye previously injected into a lymph vessel in the vital observation portion and an image processing device 22 that generates and displays an image showing a position of the fluorescent dye in the lymph vessel based on a detection result of the infrared camera 21. The infrared camera 21 repeats the detection while the pressure of the manchette 11 decreases from first pressure to block a lymph flow in the vital observation portion to second pressure at restart of the lymph flow. The measurement unit 13 repeats the measurement during the period.
