A vehicle lower portion structure for a hybrid vehicle has a vehicle drive battery 32 that is mounted on top of the center floor panel 18 and on a vehicle lower side of a rear seat 26, a fuel tank 34 that is formed so as to include a tank main body portion 36 that is disposed on the vehicle lower side of the center floor panel 18 and an in-tunnel extension portion 38A that is disposed inside the floor tunnel 20 and communicates with the tank main body portion 36, and a fuel pump 40 that is provided at a position within the in-tunnel extension portion 38A where the fuel pump 40 is able to be extracted via an extraction hole 20C formed in the floor tunnel 20.