The utility model discloses an infusion device which comprises a Murphy dropper, a catheter and an infusion tube. The catheter and the infusion tube are connected with the two ends of the Murphy dropper in a communicated mode. A drainage hole is formed in the end, communicated with the Murphy dropper, of the catheter. An infusion hole is formed in the end, communicated with the Murphy dropper, of the infusion tube. The Murphy dropper comprises an upper portion and a lower portion. The lower portion is arranged in the mode of inclining relative to the upper portion. As the lower portion of the Murphy dropper inclines, the probability that small bubbles generated in the exhausting process enter the infusion tube is reduced, the workload of medical workers is reduced, worry and panic of patients are eliminated, the satisfaction degree of the patients to the work of the medical workers is increased, and the infusion device is simple in structure, low in production cost and easy to popularize.