A vehicle seat including a rod installed between left and right side frames of a seat cushion, wherein the rod is provided with a weakened part which is configured to promote the buckling distortion of the rod in a predetermined direction, wherein the weakened part includes first and second weakened portions which respectively weakens a portion of a surface of the rod facing a first direction and a portion of a surface of the rod facing a second direction opposite to the first direction at an end portion of a side of the rod to which an impact load is inputted, so that the rod is configured to be bent in the first direction and the second direction, and wherein the first weakened portion is formed closer to the side to which the impact load is inputted than the second weakened portion.