NOVELTY - The structure has a combination groove (15) formed in a lower surface of a support object panel. A fastener comprises a lower part (17) including a base surface (21) that is placed in contact with the lower surface of the support object panel. An insertion piece part (23) recovers from the base surface, and is inserted into the combination groove. An upper part (19) includes a clamp surface (35) that is placed in contact with an upper surface of the support object panel between the base and clamp surfaces such that the support object panel is supported.    USE - Truss-like support structure for installing a support object panel i.e. outdoor-installation type photovoltaic power generation panel, on a wave-like folded-plate roof of a building.    ADVANTAGE - The photovoltaic power generation panel is light in weight, and has high rigidity. The insertion piece part is engaged with the combination groove that fastens and interposes the entire thickness of the photovoltaic power generation panel from upper and lower sides, and extends along a predetermined direction in the photovoltaic power generation panel, so that application to an installation object in a viewpoint of support with respect to wind pressure is enabled without choosing installation object simultaneously to perform sufficient support by the wind pressure. The clamp surface and the base surface are separated by mounting the upper part on the lower part with a thickness ensuring wall provided in the upper part, so that panel accommodation space for the support object panel inside the thickness ensuring wall, the clamp surface and the base surface is easily and reliably secured, thus ensuring efficient workability of the support object panel.    DETAILED DESCRIPTION - The support object panel is a photovoltaic power generation panel (3). The fastener is a stainless steel made fastener. An INDEPENDENT CLAIM is also included for a method for supporting an outdoor installation type panel.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of a region located between fasteners.    Photovoltaic power generation panel (3)    Combination groove (15)    Lower part (17)    Upper part (19)    Base surface (21)    Insertion piece part (23)    Clamp surface (35)