We propose a new multi-projection integral imaging scheme using a convex mirror array. In the proposed scheme, to overcome the resolution limitation of the conventional method due to observing the single aperture imaging point (AIP) from each convex mirror, we introduce the multi-projection to obtain multiple AIPs per convex mirror so that the viewer observes the resolution-improved 3D reconstructed images. We validate the theoretical analysis of the proposed scheme and confirm its feasibility through the optical experiments. To our best knowledge, this is the first report to generate multiple AIPs per convex mirror in a projection integral imaging system.