Combine flour, oats, soda, cinnamon and salt; set aside.

Cream butter and gradually add sugars, beating until light and fluffy. Add egg and vanilla; mix well.

Alternate addition of dry ingredients and pumpkin, mixing well after each addition. Stir in chocolate chips.

For each cookie, drop large tablespoon onto cookie sheet. Bake for 20 to 25 minutes until cookies are firm and lightly browned. Remove from pan and cool on racks.