The invention discloses an intake manifold, and relates to the field of automobile engines. Therefore, continuous adjustment of the volume of a pressure stabilization cavity of the intake manifold can be achieved. The intake manifold comprises the pressure stabilization cavity, and further comprises an adjustment cavity, wherein the pressure stabilization cavity is communicated with the adjustment cavity, and an adjustment mechanism is arranged in the adjustment cavity and can continuously adjust the volume of the communication part between the adjustment cavity and the pressure stabilization cavity. The intake manifold can be applied to the automobile engines.