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 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; 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 to extend obliquely downwardly with regards to the vehicle top-and-bottom direction from a position forward of the vehicle to a position rearward of the vehicle with regards to the vehicle front-and-rear direction, and supports the rear arm at the body frame to be swingable in the vehicle top-and-bottom direction, 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, 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 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 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 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; 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 to extend obliquely downwardly with regards to the vehicle top-and-bottom direction from a position forward of the vehicle to a position rearward of the vehicle with regards to the vehicle front-and-rear direction, and supports the rear arm at the body frame to be swingable in the vehicle top-and-bottom direction, 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, 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 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 to overlap with at least part of the inertial measurement unit in a plan view of the vehicle.