A grain pan for a combine harvester comprises a plurality of grain pan members with a closed surface grain contacting surface adapted to engage the harvested crop. More than one of the grain pan members are grain pan members comprising a first connection element and a second connection element, the first connection element being adapted to effectuate a detachable connection with the second connection element of another grain pan body member and vice versa. The grain pan members are detachably connected to each other, one behind the other via their respective first and second connection elements, in a direction substantially parallel to the main direction of grain transportation.