[Problem] To provide an injection needle assembly and a medicine injection apparatus in which it is possible to position a needle tube reliably in an upper layer region of a skin even in a case in which the pressing force to the skin is strong. [Solving Means] An injection needle assembly 2 includes a needle tube 5 having a needle tip 5A to be stuck into a skin, a first member 11, a second member 12, an adjustment portion 22, and a pressing force restricting member 15. The first member 11 holds the needle tube 5 and the second member 12 holds the first member 11 movably toward the axial direction of the needle tube 5. A discharge portion of the syringe 3 is fitted into this second member 12. The adjustment portion 22 is provided at the periphery of the needle tube 5 and includes a needle protrusion surface 22A which abuts the skin in a case in which the needle tube 5 is stuck to the living body. The pressing force restricting member 15 is arranged between the first member 11 and the second member 12, and restricts the pressing force added from the first member 11 to the skin.
