A micro mirror structure and a projection apparatus using the same are provided. The micro mirror structure suitable for being used in a digital micro mirror device of a projection apparatus. The micro mirror structure includes a micro mirror, a pair of main posts and a pair of landing posts. The micro mirror is configured to swing about a swinging hinge, wherein the swinging hinge is extended along a first axis parallel to a first side of the micro mirror and the length of the swinging hinge is greater than the length of the first side of the micro mirror. The main posts are respectively disposed on two opposite ends of the swinging hinge for supporting the swinging hinge and the micro mirror. The pair of landing posts are respectively disposed at two opposing sides of swinging hinge along a second axis perpendicular to the first axis.