A follower roller mounting mechanism for a paper feeding apparatus is provided, which has at least one follower roller and a shaft passing through the follower roller. The follower roller mounting mechanism includes a base having a trough and a hole on a top surface thereof. The trough has a back wall, a bottom wall, and two opposite lateral walls. The bottom wall and the back wall are adjacent to each other. Each of the lateral walls has a sliding slot. The shaft is disposed inside the base passing through the trough via the sliding slot for making the follower roller protruding from the top surface through the hole. An elastic element is disposed between the shaft and the back wall for generating elastic force, pushing the shaft sliding along the sliding slot, and making the follower roller to constantly rise above the top surface through the hole.