A shingle installation device comprises a body that maintains an alignment stop and a positioning stop that are parallely spaced by a predetermined distance to provide suitable overlap of successively installed shingles. The body also maintains a retainer that forms a gap that is configured to receive and retain the position of a shingle that is being installed. Thus, when the installation device is positioned such that the alignment stop rests against an edge of an installed shingle, an edge of the shingle to be installed is placed within the gap where it is retained in its correct position until the shingle is fastened to the surface being covered.