NOVELTY - The method involves laminating a solar cell module (20), and a protection sheet (1) with uneven structure in surface opposite to a sticking surface so that light-incidence surface of solar cell module and a sticking surface of protection sheet is opposite on both sides of a planarization material (30). The solar cell module and a protection sheet are clamped in a deformable state of planarization material pinched into light-incidence and sticking surfaces. The protection sheet is stuck to light-incidence surface based on sticking force of planarization material.    USE - Method for sticking protection sheet used in photoelectric conversion apparatus (claimed) such as solar cell apparatus installed in outdoor.    ADVANTAGE - The loss of light can photo-electrically convert efficiently with the photoelectric conversion apparatus. The protection sheet can be stuck to the light-incidence surface of the solar cell module easily and reliably. The photoelectric conversion apparatus can be manufactured easily. The utilization factor of light can be improved. The contribution or the environmental-damage prevention by reflection of sunrays for the improvement of the photoelectric conversion efficiency can be attained. The protection sheet with sufficient transparency and impact resistance can be manufactured easily and reliably. The electric power generation efficiency of the photoelectric conversion apparatus can be improved. Decline in the photoelectric conversion rate of the photoelectric conversion apparatus can be suppressed.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) the manufacturing method of photoelectric conversion apparatus; and    (2) the photoelectric conversion apparatus.    DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view illustrating the protection sheet sticking method for photoelectric conversion apparatuses in the state where the planarization material is coated and the state which the protection sheet is laminated.    Protection sheet (1)    Solar cell module (20)    Photovoltaic cell (21)    Sealing material (22)    Planarization material (30)