FUEL CELL SYSTEM

The fuel cell system includes a fuel cell, a hydrogen circulation pump, heating portion, and a controller. The hydrogen circulation pump is configured to circulate hydrogen to the fuel cell and includes a cylinder and a rotor accommodated in the cylinder. The heating portion is configured to heat the cylinder. The controller is configured to control an operation of the heating portion. The controller is configured to cause the heating portion to heat the cylinder in a case where a driving state of the hydrogen circulation pump is higher than or equal to a standard driving state.