A fluid delivery device comprising: a dispensing patch unit (10) comprising a reservoir, a driving mechanism, and a pumping mechanism； and a cradle unit (20) which is configured to adhere to the skin of a patient, with the dispensing patch unit (10) being connectable to and disconnectable from the cradle unit (20), wherein the dispensing patch unit has two parts: a disposable part (200) and a reusable part (100).
