A Veress needle including a hollow puncturing needle having a distal end portion with a needle tip and a lumen, an insertion member slidably inserted in the lumen, an urging device and a pullout preventing device. The urging device is adapted to urge the insertion member such that, before puncturing is performed by the needle tip and after the puncturing is completed, a distal end portion of the insertion member protrudes from the needle tip, and the distal end portion of the insertion member is retreated to the lumen based on a load of the puncturing upon the puncturing by the needle tip. The pullout preventing device, after the load of the puncturing disappears, prevents the needle tip from being pulled out from a puncturing site in conjunction with protruding movement of the distal end portion of the insertion member from the lumen.
