Provided is an electric pipette provided with an advance discharge function which makes the discharge volume accurate and reliable. This electric pipette comprises a cylinder (2) which communicates with a pipette chip (8), a piston (3) which moves up and down inside the cylinder, a ball screw (5) for moving the piston up and down, a rotational driving motor (6) which can rotate the ball screw forwards or backwards, a control means (20) that can control the rotational speed of the motor, and a user interface unit (18) which allows selecting a configured volume and a pipette operation mode. During suction operations, the configured volume and a correction volume are sucked in, and immediately after the suction operation, the correction volume is automatically discharged.本發明提供一種具備能正確且確實形成吐出容量之預先排出功能的電動吸量管。本發明包含:與吸量管用吸頭(8)連通的量筒(2)、和在量筒內上下移動的活塞(3)、和使活塞上下動作用的滾珠螺桿(5)、和可使滾珠螺桿正逆轉的旋轉驅動馬達(6)、和可控制馬達轉數的控制手段(20)、以及可選擇設定容量與吸量管之動作模式的使用者界面部(18),在吸引動作時,係吸引設定容量與補正容量,且在吸引動作後立即自動排出補正容量。
