A syringe and needle assembly including a needle tube having a needle tip for puncturing a living body. A syringe is formed integrally with the needle tube. The syringe includes a main body to be filled with a drug and a securing section that is formed integrally with the main body. The securing section has a close contact area that has an outer peripheral surface that contacts an inner surface of a cap when the cap is attached, and a connection area that connects the close contact area and the main body to each other. A needle tip of the needle tube protrudes from the close contact area, and a parting line is formed on the securing section. The outer peripheral surface of the close contact area has no parting lines.
