Oil pump device and relief valve

This oil pump device is equipped with a first oil passage, a second oil passage, a relief oil passage, and a relief valve. The relief valve includes a valve body that moves inside a valve housing section so as to switch the second oil passage disposed on a second discharge port side and the first oil passage disposed on a first discharge port side between a communicating state and a non-communicating state and switch the second oil passage and the relief oil passage between a communicating state and a non-communicating state.