A straddled vehicle comprising: a head pipe ; a down frame extending downward from the head pipe and having a tubular shape; a first lower frame , a second lower frame , a first rear frame , and a second rear frame , wherein the head pipe is inclined rearward and upward in a vehicle side view, the first lower frame and the second lower frame are connected to a lower portion of the down frame , the first lower frame extends leftward and rearward from the down frame , the second lower frame extends rightward and rearward from the down frame , the first rear frame extends rearward and upward from the first lower frame , the second rear frame extends rearward and upward from the second lower frame , the first lower frame , the second lower frame , the first rear frame , and the second rear frame each have a tubular shape; a lid member disposed in the down frame and fixed to the down frame , characterized by a first side frame extending rearward and to one of left and right from the down frame ; a second side frame extending rearward and to the other of the left and right from the down frame ; wherein the first side frame and the second side frame are separate parts from each other, the first side frame includes a first connection end connected to the down frame , the second side frame includes a second connection end connected to the down frame , the first side frame is disposed below the first lower frame , the first side frame is connected to the down frame and the first lower frame , the first side frame is connected to the down frame at a position lower than the first lower frame , the second side frame is disposed below the second lower frame , the second side frame is connected to the down frame and the second lower frame , the second side frame is connected to the down frame at a position lower than the second lower frame , and in the vehicle side view, the lid member overlaps with the first connection end of the first side frame . a head pipe ; a down frame extending downward from the head pipe and having a tubular shape; a first lower frame , a second lower frame , a first rear frame , and a second rear frame , wherein the head pipe is inclined rearward and upward in a vehicle side view, the first lower frame and the second lower frame are connected to a lower portion of the down frame , the first lower frame extends leftward and rearward from the down frame , the second lower frame extends rightward and rearward from the down frame , the first rear frame extends rearward and upward from the first lower frame , the second rear frame extends rearward and upward from the second lower frame , the first lower frame , the second lower frame , the first rear frame , and the second rear frame each have a tubular shape; a lid member disposed in the down frame and fixed to the down frame , characterized by a first side frame extending rearward and to one of left and right from the down frame ; a second side frame extending rearward and to the other of the left and right from the down frame ; wherein the first side frame and the second side frame are separate parts from each other, the first side frame includes a first connection end connected to the down frame , the second side frame includes a second connection end connected to the down frame , the first side frame is disposed below the first lower frame , the first side frame is connected to the down frame and the first lower frame , the first side frame is connected to the down frame at a position lower than the first lower frame , the second side frame is disposed below the second lower frame , the second side frame is connected to the down frame and the second lower frame , the second side frame is connected to the down frame at a position lower than the second lower frame , and in the vehicle side view, the lid member overlaps with the first connection end of the first side frame . <EOS>