The present invention is provided to securely position a needle tip and a blade face of a needle tube in a predetermined site of the skin of a living body, such as the upper layer of skin. An injection needle assembly includes a needle tube 2 having a needle tip capable of puncturing a living body, a hub 3 holding the needle tube, a stabilizer 4, and a guide portion 7. The stabilizer 4 is formed in a tubular shape surrounding the circumference of the needle tube 2, and an end face 6b is pressed against the skin, and thereby a raised portion of the skin is formed in a tube hole 6a. The guide portion 7 is arranged on the stabilizer 4, and is adapted to identify a press-in distance y of the stabilizer 4 relative to the skin.一種注射針組合體,其使穿刺至皮膚內的針管的針尖以及刃面確切地位於以皮膚上層部為代表的生物體的特定部位。本發明的注射針組合體1包括:具有可穿刺至生物體內的針尖的針管2、保持針管2的針座3、穩定部4以及導引部7。穩定部4是以包圍針管2的周圍的方式而形成為筒狀,且藉由將端面6b壓附於皮膚,而於筒孔6a內形成皮膚的隆起。導引部7是設置於穩定部4,且對相對於皮膚而壓入穩定部4的距離y加以辨識。1‧‧‧注射針組合體2‧‧‧針管2a‧‧‧刃面2b‧‧‧針孔3‧‧‧針座3a‧‧‧針座本體3b‧‧‧凸緣4‧‧‧穩定部(皮膚變形部)5‧‧‧固定部5a、6a‧‧‧筒孔6‧‧‧接觸部6b‧‧‧端面7‧‧‧導引部(距離辨識部)7a‧‧‧接觸面B‧‧‧斜面長d‧‧‧內徑L‧‧‧針突出長x‧‧‧導引部長度(辨識部長度)y‧‧‧導引部高度(辨識部高度)
