The integrated puncture needle adapter is equipped with: a puncture needle a needle hub a tubular fixing part for fixing the needle hub a tubular puncture needle accommodating part provided on a distal side of the tubular fixing part and having therein an accommodating space for accommodating the puncture needle a second connecting part provided on a distal side of the puncture needle accommodating part and a separable part which is formed between the tubular fixing part and the puncture needle accommodating part. A part on the distal side of the separable part is separable from a part on the proximal side of the separable part. The puncture needle is exposed when separated.
