A scooter type vehicle comprising: a body frame including a head pipe , a down frame extending downward from the head pipe , a first lower frame made of a pipe extending rearward in front-rear direction of the vehicle from the down frame , and a first seat frame extending rearward in front-rear direction of the vehicle and upward from the first lower frame in up-down direction of the vehicle; a seat arranged upward of the first seat frame ; a footboard arranged forward of the seat in front-rear direction of the vehicle and upward of the first lower frame in up-down direction of the vehicle, the footboard is configured to rest feet of a rider seated on the seat ; a pivot shaft attached to the first lower frame or the first seat frame ; and a power unit pivotally supported on the pivot shaft , wherein: the first lower frame and the first seat frame are formed as separate parts; the first lower frame includes a main connecting portion connected to a lower end surface of the first seat frame , and a rear extension located rearward in front-rear direction of the vehicle relative to the main connecting portion , wherein a lower end of a rear edge of the rear extension is located forward in front-rear direction of the vehicle relative to an upper end of a rear edge of the rear extension , characterized in that the scooter type vehicle includes an internal reinforcement member that is arranged inside the first lower frame and rearward relative to a front end of the main connecting portion in front-rear direction of the vehicle. a body frame including a head pipe , a down frame extending downward from the head pipe , a first lower frame made of a pipe extending rearward in front-rear direction of the vehicle from the down frame , and a first seat frame extending rearward in front-rear direction of the vehicle and upward from the first lower frame in up-down direction of the vehicle; a seat arranged upward of the first seat frame ; a footboard arranged forward of the seat in front-rear direction of the vehicle and upward of the first lower frame in up-down direction of the vehicle, the footboard is configured to rest feet of a rider seated on the seat ; a pivot shaft attached to the first lower frame or the first seat frame ; and a power unit pivotally supported on the pivot shaft , wherein: the first lower frame and the first seat frame are formed as separate parts; the first lower frame includes a main connecting portion connected to a lower end surface of the first seat frame , and a rear extension located rearward in front-rear direction of the vehicle relative to the main connecting portion , wherein a lower end of a rear edge of the rear extension is located forward in front-rear direction of the vehicle relative to an upper end of a rear edge of the rear extension , characterized in that the scooter type vehicle includes an internal reinforcement member that is arranged inside the first lower frame and rearward relative to a front end of the main connecting portion in front-rear direction of the vehicle. the first lower frame and the first seat frame are formed as separate parts; the first lower frame includes a main connecting portion connected to a lower end surface of the first seat frame , and a rear extension located rearward in front-rear direction of the vehicle relative to the main connecting portion , wherein a lower end of a rear edge of the rear extension is located forward in front-rear direction of the vehicle relative to an upper end of a rear edge of the rear extension , characterized in that the scooter type vehicle includes an internal reinforcement member that is arranged inside the first lower frame and rearward relative to a front end of the main connecting portion in front-rear direction of the vehicle. <EOS>