Combine olive oil and taco seasoning in a small bowl.
Split each pita bread into 2 rounds. Cut each round into 8 wedges. Place wedges on a lightly greased baking sheet. Brush rough side of each wedge with oil mixture. Sprinkle wedges with cheese. Bake at 350° for 15 minutes or until crisp. Remove from oven; transfer to wire racks to cool.