The electro-optic device of the present invention includes an arrangement of an electro-optic panel and a lenticular lens sheet on one side of the electro-optic panel, wherein the lenticular lens sheet includes multiple cylindrical lenses arrayed parallel to one another and an alignment line extending in such a direction as to intersect with the cylindrical lenses at a predetermined angle. The lenticular lens sheet has cylindrical lenses arrayed so that the longitudinal direction of the cylindrical lenses intersects with the pixel array direction of the electro-optic panel at a predetermined angle, and has an alignment line formed in the lenticular lens sheet that is in alignment with the positioning reference portions of the electro-optic panel.