The invention relates to a sampling device. In order to solve the sampling problem of sodium potassium alloy, the invention provides a sodium potassium alloy sampling device, comprising a predischarge tank, a sampling tank and a filter net type filter; the predischarge tank and the sampling tank are provided with a vent and a liquid inlet respectively; the liquid inlet of the predischarge tank is connected with one connector of a second tee ball valve by a pipeline; the liquid inlet of the sampling tank is connected with another connector of the second tee ball valve by a pipeline; the rest connector of the second tee ball valve is connected with one connector of a first tee ball valve of which another connector is connected with the inlet of the filter net type filter; the rest connector of the first tee ball valve is connected with a sampling pipeline. The sodium potassium alloy sampling device is delicate and concise in structure, safe and reliable to operate, economic and practical, convenient to detach and easy to clean, effectively avoids the influence of a stained sample on a subsequent analysis result and better realizes the obtaining and transferring of a sodium potassium sample.