Abstract: A rock trap for a farm vehicle such as a combine or the like removes rocks from crops being harvested thus preventing rocks from entering the threshing area of the combine. Crop material is fed through a feeder house toward a drum and all the crop material moves under the drum. Rocks are forced by the drum into a storage trap. The crop material is then fed to the threshing area. The storage trap opens when full to drop the rocks on the ground and the storage trap also opens when a large rock is forced against the trap by the drum. Thus the rocks which enter the feeder house do not reach the threshing area of the combine.