A display apparatus includes: a variable compression ratio mechanism which is capable of modifying an engine compression ratio of an internal combustion engine and a display displaying a state of a present engine compression ratio. For example, when a driving at an engine compression ratio with a good fuel economy is carried out, a display switching is not unnecessarily carried out even under a vehicular acceleration and the display can cause a driver to be recognized that the driving is carried out in a good fuel economy state. On the other hand, when the driving state is switched from the driving state of good fuel economy to that of a bad fuel economy due to an abrupt depression of an accelerator pedal, the display of the engine compression ratio is accordingly varied.