This invention relates to a birdcage. The birdcage includes a cage body and at least one feeding unit. The cage body has a through hole. The feeding unit is combined to the through hole of the cage body and includes a frame and a active gate. The frame has a top portion, a bottom portion, an outer stopping portion located below the top portion and an inner stopping portion. The top portion, the bottom portion and the outer stopping portion of the frame protrudes outside of the cage body, and the frame has an opening between a bottom edge of the outer stopping portion and the bottom portion. The inner stopping portion is located in the opening of the frame and extends into the cage body. The bottom edge of the outer stopping portion, the bottom portion and the inner stopping portion together form a space for placing a feeding container. The active gate is mounted outside the frame and is configured to move upwardly and downwardly with respect to the frame for opening or closing the opening of the frame. The active gate has curved shape and has a plurality of holes thereon.本發明揭露一種鳥籠結構,其包括一籠體及至少一餵食單元。該籠體具有一通口,該餵食單元係結合於該籠體的通口,且包括一架體及一活動柵門。該架體包括一頂部、一底部、設於該頂部下方的一外擋部、以及一內擋件。其中,該頂部、該底部以及該外擋部係凸出於該籠體外,且該外擋部的底緣與該底部之間界定有一開口。該內擋件位於該開口,且向內延伸到該籠體內。該外擋部的底緣、該底部以及該內擋件之間係形成一容置空間,用以放置一餵食容器。該活動柵門係組設於該架體外,且可相對於該架體上下移動,以開啟或關閉該架體的開口;該活動柵門係為弧形的,且其上具有多個穿孔。1‧‧‧餵食單元40‧‧‧結合片51‧‧‧螺絲8‧‧‧籠體80‧‧‧通口
