Intradermal syringe and needle assembly

A (1) is a liquid injection device and administration the pinhead component, comprising a belt needle (6) needle tube (4) and surrounds the needle tube (4) and a reducing contact surface (10) killer (32), the killer (32) capable of the first from the position of the fixing second position, the first position grains, a needle pipe long and thin part, and fixing second position; the killer (32) can not from the second from the position of the first position; and (6) crosses reducing the contact surface (10) is extended and 3 mm or more distance of the second position needle.