NOVELTY - A hybrid vehicle structure comprises a battery pack (31) that has a secondary battery (32) constituted by battery cells (33) stacked in a vehicle traveling direction for supplying electric power to motor, and an intake chamber (34) ; an exhaust passage (21) having an exhaust port and extending from the internal combustion engine, passing below the vehicle floor, to the exhaust port. The exhaust passage is provided so that it passes immediately below the battery pack and passes a position displaced from a position immediately below the intake chamber.    USE - The structure is used for a hybrid vehicle.    ADVANTAGE - The hybrid vehicle structure suppresses the reduction in the efficiency of cooling a secondary battery without placing a great limit on routing of an exhaust pipe. The performance of the internal combustion engine can be prevented from being impaired. Since variations in the temperature between each of battery cells is suppressed to be small, improvements in the battery performance and the battery lifetime can be achieved.    DETAILED DESCRIPTION - Hybrid vehicle structure having an internal combustion engine and a motor, comprises:    (a) a battery pack that has a secondary battery constituted by battery cells stacked in a vehicle traveling direction for supplying electric power to the motor, and an intake chamber provided adjacent to the secondary battery in a horizontal direction perpendicular to the direction along which the battery cells are stacked for supplying cooling air between each of the battery cells, and that is arranged on a vehicle floor (15);    (b) an exhaust passage having an exhaust port and extending from the internal combustion engine, passing below the vehicle floor, to the exhaust port; and    (c) a catalyst portion provided on a route of the exhaust passage for purifying exhaust gas.    The exhaust passage is provided so that it passes immediately below the battery pack and passes a position displaced from a position immediately below the intake chamber.    DESCRIPTION OF DRAWING(S) - The figure is a perspective view showing a battery pack.    Vehicle floor (15)    Exhaust passage (21)    Battery pack (31)    Secondary battery (32)    Battery cells (33)    Intake chamber (34)