布氏漏斗（Büchner funnel）是实验室中使用的一种陶瓷仪器，也有用塑料制作的，用来使用真空或负压力抽吸进行过滤。普遍认为发明者为1907年诺贝尔化学奖获得者爱德华·比希纳（Eduard Buchner），事实上布氏漏斗是由化学家Ernst Büchner发明的。

形状为扁圆筒状，圆筒底面上开了很多小孔。下连一个狭长的筒状出口。

使用的时候，一般先在圆筒底面垫上滤纸，将漏斗插进布氏烧瓶上方开口并将接口密封（例如用橡胶环）。布氏烧杯的侧口连抽气系统。然后将欲分离的固体、液体混合物倒进上方，液体成分在负压力作用下被抽进烧杯，固体留在上方。

A Büchner funnel is a piece of laboratory equipment used in filtration. It is traditionally made of porcelain, but glass and plastic funnels are also available. On top of the funnel-shaped part there is a cylinder with a fritted glass disc/perforated plate separating it from the funnel. The Hirsch funnel has a similar design; it is used similarly, but for smaller quantities of material. The main difference is that the plate of a Hirsch funnel is much smaller, and the walls of the funnel angle outward instead of being vertical.