The present invention refers to a safety needle within a guide tube (3) wherein one or more stuffing(s) 4 are plugged into the guide tube (3) to be fixed there and to give resistance to the needle body (1) during its passage therethrough. The needle body (1) is movably held by the stuffing (4) and is advanced through the cavity of the guide tube (3). A stopper (5) is preferably mounted to the lower end of a needle handle (2) attached to the top end of the needle body (1) or to the top end of the guide tube (3). The length of the needle body (1) of the safety needle is in the length to reach insertion depth.Further, the invention is directed to a corresponding needle set.