A straddled vehicle comprising: a head pipe; a left seat frame that is placed rearward and leftward of the head pipe and extends rearward; a right seat frame that is placed rearward and rightward of the head pipe and extends rearward; a cross member that is connected to the left seat frame and the right seat frame and extends in a left-right direction; a taillight having a front end and a rear end that is located rearward of the left seat frame and the right seat frame; a main seat on which a rider sits that is placed rearward of the head pipe; a tandem seat on which a tandem rider sits that is placed rearward of the main seat and at least a portion of which is placed upward of the left seat frame, the right seat frame and the cross member; and a grab bar supported by the cross member, wherein: the tandem seat has a rear end that is located rearward of the front end of the taillight; and the grab bar includes: a fixed portion fixed to the cross member that is placed so as to overlap with the cross member as the vehicle is seen from above; a grab portion including a left grab portion that extends rearward from the fixed portion and is placed leftward of a vehicle center line and a right grab portion that extends rearward from the fixed portion and is placed rightward of the vehicle center line; a front support portion that is placed so as to overlap with the cross member as the vehicle is seen from above and supports the tandem seat, characterized by a rear support portion at least a portion of which is placed rearward of the cross member, the left seat frame and the right seat frame and which supports the tandem seat. a head pipe; a left seat frame that is placed rearward and leftward of the head pipe and extends rearward; a right seat frame that is placed rearward and rightward of the head pipe and extends rearward; a cross member that is connected to the left seat frame and the right seat frame and extends in a left-right direction; a taillight having a front end and a rear end that is located rearward of the left seat frame and the right seat frame; a main seat on which a rider sits that is placed rearward of the head pipe; a tandem seat on which a tandem rider sits that is placed rearward of the main seat and at least a portion of which is placed upward of the left seat frame, the right seat frame and the cross member; and a grab bar supported by the cross member, wherein: the tandem seat has a rear end that is located rearward of the front end of the taillight; and the grab bar includes: a fixed portion fixed to the cross member that is placed so as to overlap with the cross member as the vehicle is seen from above; a grab portion including a left grab portion that extends rearward from the fixed portion and is placed leftward of a vehicle center line and a right grab portion that extends rearward from the fixed portion and is placed rightward of the vehicle center line; a front support portion that is placed so as to overlap with the cross member as the vehicle is seen from above and supports the tandem seat, characterized by a rear support portion at least a portion of which is placed rearward of the cross member, the left seat frame and the right seat frame and which supports the tandem seat. the tandem seat has a rear end that is located rearward of the front end of the taillight; and the grab bar includes: a fixed portion fixed to the cross member that is placed so as to overlap with the cross member as the vehicle is seen from above; a grab portion including a left grab portion that extends rearward from the fixed portion and is placed leftward of a vehicle center line and a right grab portion that extends rearward from the fixed portion and is placed rightward of the vehicle center line; a front support portion that is placed so as to overlap with the cross member as the vehicle is seen from above and supports the tandem seat, characterized by a rear support portion at least a portion of which is placed rearward of the cross member, the left seat frame and the right seat frame and which supports the tandem seat. a fixed portion fixed to the cross member that is placed so as to overlap with the cross member as the vehicle is seen from above; a grab portion including a left grab portion that extends rearward from the fixed portion and is placed leftward of a vehicle center line and a right grab portion that extends rearward from the fixed portion and is placed rightward of the vehicle center line; a front support portion that is placed so as to overlap with the cross member as the vehicle is seen from above and supports the tandem seat, characterized by a rear support portion at least a portion of which is placed rearward of the cross member, the left seat frame and the right seat frame and which supports the tandem seat.