A projection apparatus including a projection body and at least one adjusting leg is provided. The projection body has a casing, and the bottom of the casing has at least one accommodating cave. The adjusting leg includes a supporter and a pivoting rod. The supporter has a supporting portion and a screw connected to the supporting portion, and the projection body is capable of being supported on a surface by the supporting portion. The pivoting rod is pivoted to the casing and has a threaded hole, and the screw is screwed into the threaded hole. The pivoting rod is capable of being rotated along an axis of the pivoting rod to drive the supporter to rotate, so as to accommodate the supporting portion in the accommodating cave.