Pipetting device

The utility model provides a pipetting device. The pipetting device comprises a bracket, a pipette, a connecting pipe, a sealing plate, an elastic piece and an air exhaust assembly, the pipette is arranged on the bracket; the connecting pipe is provided with a first section and a second section which are connected, the second section is in sealed connection with the air suction end, and an annular sealing table is formed on the inner wall of the first section in the circumferential direction. The sealing plate can seal and cover the air exhaust channel; the elastic piece is connected to the sealing table and the sealing plate; the air exhaust assembly comprises an air exhaust pipe and an air pump, a limiting pressing plate is arranged on the peripheral wall of the air exhaust pipe, and when the limiting pressing plate abuts against the sealing table, the sealing plate is separated from the sealing table, and the air pump communicates with the air exhaust pipe. According to the embodiment of the utility model,