A waterproof kit is suitable for a patient's hand that is inserted into a peripheral venous catheter and is fixed on a fixed board. The waterproof kit includes an outer bag detachably disposed on the fixed board and an outer bag received in the outer bag. The inner waterproof cover has an opening through which the hand and the fixing plate can enter, and can be taken out from the outer bag and spread out to cover the hand and the fixing plate. The present invention also relates to a waterproof protective device, which includes a fixing unit and a waterproof kit as described above. The fixing unit includes a bottom plate and a fixing connected to the bottom plate and used to fix the hand to the top surface of the bottom plate. The waterproof kit is detachably disposed on the bottom surface of the bottom plate.一種防水套件,適用於被插入一周邊靜脈導管且被固定於一固定板上的病患手部,該防水套件包含有一可分離地設置於該固定板的外袋以及一容置於該外袋內的防水套,該防水套具有一可供該手部以及該固定板進入之開口,而可自該外袋內被取出並展開包覆該手部以及該固定板。本新型亦有關於一種防水護具,包含有一固定單元以及一如上所述的防水套件,該固定單元包括一底板以及一連接於該底板並用於將該手部固定於該底板之頂面的固定件,該防水套件是可分離地設置於該底板之底面。