INTAKE MANIFOLD

In an intake manifold made of a resin and including: a surge tank applied to an engine, an intake air flowing into the surge tank ; and branch pipes and branched from the surge tank and connected to intake ports of the engine, a pillar portion penetrating through an internal space of the surge tank and connecting an inner wall and an outer wall facing each other is included, and a cross section perpendicular to an extending direction of the pillar portion has an oval shape elongated in an passing direction of the intake air inside the surge tank