A syringe barrel with an pouring portion and a cylindrical main body having a insertion portion, wherein the cylindrical main body has a laminated structure, and the inner surface of the cylindrical main body has a surface roughness of 4 nm to 25 nm as an arithmetic average roughness (Ra).一種注射器針筒,具備具有注出部及插入部之筒狀本體,前述筒狀本體具有層積構造,前述筒狀本體內表面的表面粗糙度,為算術平均粗糙度(Ra)4nm~25nm。