To join optical sheets to each other without degrading optical characteristics of the display area of an optical film.

This invention relates to an optical sheet laminated body which is formed by laminating a plurality of optical sheets on each other. The optical sheets have sheet bodies 41e, 42e, 43e and projecting portions 41a, 42a, 43a, 41b, 42b, 43b, 41c, 42c, 43c, 41d, 42d, 43d projecting in the directions of the respective surfaces of the sheet bodies from the respective peripheral edges of the sheet bodies, wherein only the projecting portions of the optical sheets are joined to each other.