Underground gas sampler

The utility model discloses an underground gas sampler, which relates to the technical field of gas samplers and adopts the technical scheme that the underground gas sampler comprises a gas suction ball main body, a gas inlet joint is fixedly mounted on the left side surface of the gas suction ball main body, a gas inlet mechanism is mounted on the left side surface of the gas inlet joint, and a gas outlet joint is fixedly mounted on the right side surface of the gas suction ball main body; a mechanical barometer is installed on the upper surface of the air outlet connector, an air outlet mechanism is fixedly installed on the right side face of the air outlet connector, and a protection mechanism is fixedly installed on the outer surface of the air suction ball body. The sampler made of the air suction ball is smaller than an original air suction cylinder in size and mass, is convenient to carry, can be operated by a single person, is simple in operation process, can be pinched and placed until the sampling b