PROBLEM TO BE SOLVED: To provide an underwater exercise tool which can be enjoyed in two ways with one unit. The present invention is an underwater exercise tool 100 for rotating a water wheel with a pedal. The underwater exercise tool 100 includes a first saddle 31 provided above the water wheel 2 and a second saddle 51 provided behind the water wheel 2, and is in a state of sitting on the first saddle 31 and a second saddle. The water turbine 2 can be rotated by the pedal 28 from both the states of sitting on the 51. [Selection diagram] Fig. 1【課題】１台で２通りに楽しむことができる水中用運動具を提供する。【解決手段】本発明は、水車をペダルにより回動操作する水中用運動具１００である。水中用運動具１００は、水車２の上方に設けられる第１サドル３１と、水車２の後方に設けられる第２サドル５１とを備え、第１サドル３１に腰をかけた状態と、第２サドル５１に腰かけた状態の両方からペダル２８により水車２を回動操作できる。【選択図】図１
