Abstract: The present disclosure is directed to an indwelling needle set which includes a needle tip protector device which adds a minimal length to the needle set to maintain operability of the device. To accomplish this, a needle tip protector device is provided for releasable attachment to the needle set. The protector device includes a body and a protecting sleeve which is movable through an opening in the body from an advanced position located substantially within the body to a retracted position extending rearwardly from the body. The protecting sleeve is dimensioned to slidably receive a puncturing needle which includes an increased diameter position which cannot be withdrawn through the protecting sleeve.