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.
