PROBLEM TO BE SOLVED: To provide a riding type mower which is able not only to switch a cutting blade transmission belt to a loosened state with an operation tool through a simple operation, but also to allow ease of operation of the operation tool while maintaining a simple structure.SOLUTION: A spring support body 44 is slidably supported on a support portion provided to a connecting member 16 connected to a link mechanism 6b, the spring support body supporting a side of a tension spring 43 opposite to the side connecting the tension spring to a tension wheel body 32, the tension spring biasing the tension wheel body to a tension position, the tension wheel body being freely movable between a tension position and a tension release position. An operation tool 41 slides the spring support body 44 between the tension side and the loosened side of the tension spring 43, the operation tool being connected to the spring support body 44 by being disposed such that the operation tool is positioned on a lateral exterior side of a cutting blade housing with respect to the connecting member 16.COPYRIGHT: (C)2013,JPO&INPIT【課題】刈刃伝動ベルトの弛緩状態への切り換えが操作具によって行えるのみならず、操作具の操作も行ないやすくできるものでありながら構造簡単に済ませる。【解決手段】緊張位置と緊張解除位置とに移動自在なテンション輪体32を緊張位置に付勢するテンションバネ43の対テンション輪体連結側とは反対側を支持するバネ支持体44を、リンク機構6bと連結する連結部材16に設けた支持部に摺動自在に支持してある。バネ支持体44をテンションバネ43の緊張側と弛緩側とに摺動操作する操作具41を、連結部材16に対して刈刃ハウジング横外側に位置するよう配置してバネ支持体44に連結してある。【選択図】図3
