The present invention relates to a corn shelter. The present invention more particularly relates to a portable corn sheller that can be operated manually to extract corn seeds from corn cob. The corn sheller according to the invention is conical in shape having wider openings and possesses four fins inside the lumen of conical corn sheller. Clockwise and anticlockwise movement of corn cob through hands helps fins to pull corn seeds embedded on the cob and facilitates its extraction. The corn sheller is also suitable for women having smaller fist size than men as conical shape of corn sheller gives a better grip to holding.