The utility model provides a sampling device. The sampling device comprises a sampling head, a sampling bottle and a sample unloading device, the sampling bottle comprises a bottle body, a bottle opening and a bottle cap, the bottle opening is connected with the bottle body, and the bottle cap is detachably connected with the bottle opening; the sampling head is detachably connected with the bottle opening, and the sample unloading device is detachably connected with the bottle opening. According to the sampling device, the functions of collecting samples from an oil well and taking out the samples are achieved, meanwhile, the problem that in the sampling process, due to the fact that the oil well is in a non-closed state, toxic gas in the oil well possibly harms the body of an operator issolved, and operation risks are reduced. In the sample taking-out process, the sampling bottle and the sample unloading device are directly connected in a sealed mode, and environmental pollution caused by crude oil leakage in the sample taking-out process is avoided.