The invention provides an improved neck pillow, and solves the technical problems that the structure of the existing neck pillow is too simple, the existing neck pillow does not have a function of adjusting a distance between the left and right ends and cannot meet the use demand of different people, and the use purpose of the existing neck pillow is single. The improved neck pillow comprises a U-shaped pillow interior and a pillowcase sleeving the pillow interior, wherein the pillow interior is provided with a left working part and a right working part; a channel for placing a neck is formed between the left working part and the right working part; a pull rope I is fixed on the left working part; a pull rope II is fixed on the right working part; an adjustment mechanism capable of adjusting a distance between the left working part and the right working part is arranged between the pull rope I and the pull rope II, and comprises an adjustment piece I arranged on the pull rope I in a sliding manner and an adjustment piece II arranged on the pull rope II in a sliding manner; a connection structure connected with the adjustment piece I and the adjustment piece II is arranged between the adjustment piece I and the adjustment piece II. The improved neck pillow has the advantage of high generality.