A straddled vehicle comprising: a body frame ; a seat that is arranged above the body frame with regards to a vehicle top-and-bottom direction (UD) and supported at the body frame ; a battery ; an inertial measurement unit ; a rear arm provided to extend rearwardly from the body frame with regards to a vehicle front-and-rear direction (FB); a drive wheel rotatably supported by the rear arm ; and a rear suspension that is provided at a position farther forward than the drive wheel with regards to the vehicle front-and-rear direction (FB) to extend obliquely downwardly with regards to the vehicle top-and-bottom direction (UD) from a position forward of the vehicle to a position rearward of the vehicle with regards to the vehicle front-and-rear direction (FB), and supports the rear arm at the body frame to be swingable in the vehicle top-and-bottom direction (UD), characterized by a resin battery case that stores the battery and the inertial measurement unit , and is fixed to the body frame to be located below the seat with regards to the vehicle top-and-bottom direction (UD), wherein the battery case has a bottom portion that protrudes toward a position between the rear suspension and the drive wheel in the vehicle front-and-rear direction (FB) so as not to overlap with the rear suspension and the drive wheel in a side view of the vehicle while being most contracted due to absorbance of shock by the rear suspension , the inertial measurement unit is fixed to the bottom portion of the battery case , and the battery is fixed to the battery case at a position above the inertial measurement unit with regards to the vehicle top-and-bottom direction (UD) to overlap with at least part of the inertial measurement unit in a plan view of the vehicle. a body frame ; a seat that is arranged above the body frame with regards to a vehicle top-and-bottom direction (UD) and supported at the body frame ; a battery ; an inertial measurement unit ; a rear arm provided to extend rearwardly from the body frame with regards to a vehicle front-and-rear direction (FB); a drive wheel rotatably supported by the rear arm ; and a rear suspension that is provided at a position farther forward than the drive wheel with regards to the vehicle front-and-rear direction (FB) to extend obliquely downwardly with regards to the vehicle top-and-bottom direction (UD) from a position forward of the vehicle to a position rearward of the vehicle with regards to the vehicle front-and-rear direction (FB), and supports the rear arm at the body frame to be swingable in the vehicle top-and-bottom direction (UD), characterized by a resin battery case that stores the battery and the inertial measurement unit , and is fixed to the body frame to be located below the seat with regards to the vehicle top-and-bottom direction (UD), wherein the battery case has a bottom portion that protrudes toward a position between the rear suspension and the drive wheel in the vehicle front-and-rear direction (FB) so as not to overlap with the rear suspension and the drive wheel in a side view of the vehicle while being most contracted due to absorbance of shock by the rear suspension , the inertial measurement unit is fixed to the bottom portion of the battery case , and the battery is fixed to the battery case at a position above the inertial measurement unit with regards to the vehicle top-and-bottom direction (UD) to overlap with at least part of the inertial measurement unit in a plan view of the vehicle. <EOS>