Assembly reaction plate, the reaction plate and the nucleic acid analysis apparatus

The present invention provides a nucleic acid analysis device, the degree of freedom of loading and unloading of the reaction plate can be effectively sample analysis. The reaction plate assembly comprising: one or more reaction wells having a reaction plate; to cover the reaction plate mounted to the cover plate may be visible through the above reaction; and a cap to cover the mounting of visible light permeable overlap member. Disposed circumferentially a predetermined circle radius r1 reaction is arcuate edge of the well.