A kind of injection needle tube has a hollow tube, a push rod group and a syringe needle group. The both ends of hollow tube are equipped with one first opening and one second opening. Push rod group is placed in hollow tube by the second opening. Push rod group has an at least push rod and a first sock. Syringe needle group has one first syringe needle pedestal, one second syringe needle pedestal and a syringe needle. First syringe needle pedestal group sets the opening of what first. The second pedestal side of one of second syringe needle pedestal is then equipped with one second socket part. A limit body is provided in second socket part, when what the second syringe needle pedestal is retracted by the push rod and syringe needle is allowed to accommodate in the what hollow tube, limit body will be crowded each other with first sock, to cause the eternal deflection of syringe needle, the risk for avoiding syringe needle from swinging back central location and may be exposed once again, thereby to improve the safety in utilization of injection needle tube.一種注射針筒具有一中空管體、一推桿組及一針頭組。中空管體的兩端設有一第一開口及一第二開口。推桿組由第二開口置入中空管體。推桿組具有至少一推桿及一第一套接部。針頭組具有一第一針頭基座、一第二針頭基座及一針頭。第一針頭基座組設於第一開口。第二針頭基座之一第二座體側邊則設有一第二套接部。第二套接部內設置有一限位體，於第二針頭基座受該推桿拉回而讓針頭容置於該中空管體內時，限位體將與第一套接部彼此擠迫，以致使針頭永遠偏斜，避免針頭擺回中央位置而可能再度外露的風險，藉此以提高注射針筒之使用安全性。
