Provided is a puncture device assembly excellent in operability. Provided is a puncture device assembly which includes an inner needle that can puncture skin, a sheath tube that has a lumen through which the inner needle can be inserted, and a support portion which is provided at a proximal portion of the sheath tube and prevents kink of the sheath tube. The support portion has a cylindrical body which is bendable and can maintain a curved shape in a state where the sheath tube is inserted.
