A pedal arm mounted on a vehicle, comprising: an arm body having a front wall, a rear wall, a left side wall, and a right side wall corresponding to a front and rear direction and a right and left direction of the vehicle, with a plurality of ribs arranged in a standing manner to be an integrally molded article; a depressing portion provided at a lower end of the arm body; a first hole penetrating the arm body in the front and rear direction of the vehicle, into which a first shaft fixed to a vehicle body is inserted; and a second hole (3.0) penetrating the arm body in the front and rear direction of the vehicle, into which a second shaft connected to a vehicle control system is inserted, and characterized in that the arm body has a first bent portion that bends in a rear direction side of the vehicle as being a lower side of the vehicle, that the rear wall in the arm body continuous downward from the first bent portion is arranged on a lower side of the vehicle than a first straight line connecting the depressing portion and the first hole and a second straight line connecting the depressing portion and the second hole, and that the plurality of ribs include, in at least one of the left side wall and the right side wall, a first rib that connects the first hole and a peripheral edge on a side of the rear wall continuous of the at least one of the left side wall and the right side wall in the arm body continuous upward from the first bent portion to extend on the first straight line as viewed in a side view of the vehicle, and a second rib that connects the second hole and a peripheral edge on the side of the rear wall continuous of the at least one of the left side wall and the right side wall in the arm body continuous upward from the first bent portion to extend on the second straight line as viewed in the side view. an arm body having a front wall, a rear wall, a left side wall, and a right side wall corresponding to a front and rear direction and a right and left direction of the vehicle, with a plurality of ribs arranged in a standing manner to be an integrally molded article; a depressing portion provided at a lower end of the arm body; a first hole penetrating the arm body in the front and rear direction of the vehicle, into which a first shaft fixed to a vehicle body is inserted; and a second hole (3.0) penetrating the arm body in the front and rear direction of the vehicle, into which a second shaft connected to a vehicle control system is inserted, and characterized in that the arm body has a first bent portion that bends in a rear direction side of the vehicle as being a lower side of the vehicle, that the rear wall in the arm body continuous downward from the first bent portion is arranged on a lower side of the vehicle than a first straight line connecting the depressing portion and the first hole and a second straight line connecting the depressing portion and the second hole, and that the plurality of ribs include, in at least one of the left side wall and the right side wall, a first rib that connects the first hole and a peripheral edge on a side of the rear wall continuous of the at least one of the left side wall and the right side wall in the arm body continuous upward from the first bent portion to extend on the first straight line as viewed in a side view of the vehicle, and a second rib that connects the second hole and a peripheral edge on the side of the rear wall continuous of the at least one of the left side wall and the right side wall in the arm body continuous upward from the first bent portion to extend on the second straight line as viewed in the side view.