Abstract: A belly exerciser has a pressing board, a shaft, a main body, a rotating disk, a bowl, a pair of connecting sleeves, and a pair of handle bars. The main body has an outer ring, and a main tube having a cross-shaped groove. The pressing board is disposed on the shaft. The shaft is inserted through the main tube. A compression spring is disposed between the pressing board and the outer ring to surround the shaft. A connecting rod is connected to the shaft. A connector is connected to an end of the connecting rod. A post is disposed on the connecting rod. The bowl is disposed on the connector. The rotating disk has an annular center flange to engage with the bowl. The connecting sleeves are disposed on the outer ring to receive the handle bars.