A vehicle with a capsule structure of a power unit includes the power unit and a transmission member. The power unit includes an internal combustion engine that combusts air-fuel mixture in an engine body and outputs a driving force, and a motor that outputs a driving force by using electric power of an electric generator or a battery. The transmission member transmits the driving force of the power unit. The capsule structure includes a heat-insulation casing having an internal space in which the power unit and the transmission member are accommodated, and a partition wall that divides the internal space of the heat-insulation casing into at least a first partition space and a second partition space which are separated from one another. At least the engine body is disposed in the first partition space, and at least the battery is disposed in the second partition space.