A suction nozzle which is configured to suck and hold a component on a suction surface by using negative pressure air and to detach the sucked and held component from the suction surface by using positive pressure air, the suction nozzle comprising: an air flow path through which the positive pressure air and the negative pressure air can selectively flow and which includes a first through-hole; a suction pad including: the suction surface; and a recessed section formed on a lower end face of the suction pad such that an outer edge section of the lower end face of the suction pad is a thin wall over an entire circumference thereof, and the outer edge section spreads outward, as going downward, wherein the first through-hole penetrates the suction pad in the up-down direction, and a rod, a lower portion of which is held to be capable of being advanced and retracted toward the suction surface in the first through hole, wherein when the suction pad is pressed against the component to be held, the outer edge section of the suction pad is in contact with the component, thereby forming the suction surface, the rod has a smaller diameter than an inner diameter of the first through-hole, when positive pressure air is supplied to the suction nozzle, air is blowing into the inside section of the recessed section of the suction pad and the rod descends such that the lower end of the rod protrudes downward of the lower end of the outer edge section of the suction pad, the rod protrudes from the suction surface by the positive pressure air flowing through the air flow path, and the rod is retracted in the inside section of the suction nozzle when the negative pressure air flows through the air flow path. an air flow path through which the positive pressure air and the negative pressure air can selectively flow and which includes a first through-hole; a suction pad including: the suction surface; and a recessed section formed on a lower end face of the suction pad such that an outer edge section of the lower end face of the suction pad is a thin wall over an entire circumference thereof, and the outer edge section spreads outward, as going downward, wherein the first through-hole penetrates the suction pad in the up-down direction, and the suction surface; and a recessed section formed on a lower end face of the suction pad such that an outer edge section of the lower end face of the suction pad is a thin wall over an entire circumference thereof, and the outer edge section spreads outward, as going downward, wherein the first through-hole penetrates the suction pad in the up-down direction, and a rod, a lower portion of which is held to be capable of being advanced and retracted toward the suction surface in the first through hole, wherein when the suction pad is pressed against the component to be held, the outer edge section of the suction pad is in contact with the component, thereby forming the suction surface, the rod has a smaller diameter than an inner diameter of the first through-hole, when positive pressure air is supplied to the suction nozzle, air is blowing into the inside section of the recessed section of the suction pad and the rod descends such that the lower end of the rod protrudes downward of the lower end of the outer edge section of the suction pad, the rod protrudes from the suction surface by the positive pressure air flowing through the air flow path, and the rod is retracted in the inside section of the suction nozzle when the negative pressure air flows through the air flow path.