A wearable injection device includes: a driven body a microneedle injection patch having an injection therein and located on a side surface of the driven body and a wearable loop having two ends connected to the two end sides of the driven body, respectively wherein the driven body has a first electrical property and the wearable loop has a second electrical property at a section opposite the driven body wherein the microneedle patch includes a microneedle array connected to the injection and penetrated the skin of a biological limb, and the wearable loop surrounds the biological limb, and a direct current resulted from the first electrical property of the driven body and the second electrical property of the wearable loop leads the injection injected into the biological limb via the microneedle array.一種穿戴式注射裝置,包含:一驅動單元;一微針注射貼片,內含注射劑且位於驅動單元之一側表面;以及一穿戴環,具有兩端分別連接於驅動單元之兩端側;其中,驅動單元帶有第一電性,穿戴環相對驅動單元之一區段帶有第二電性;其中,該微針注射貼片包含一微針陣列連通於注射劑且伸入生物肢體的皮膚中,而穿戴環係環套生物肢體,驅動單元帶有之第一電性與穿戴環之區段帶有之第二電性係產生一直流電流,以將注射劑透過微針陣列注入生物肢體內。100‧‧‧穿戴式注射裝置102‧‧‧驅動單元104‧‧‧微針注射貼片106‧‧‧穿戴環108‧‧‧啟動開關
