Fuel cell system and fuel cell vehicle

A fuel cell system, comprising:

• a fuel cell;
• a compressor configured to compress air and feed compressed air to a cathode of the fuel cell;
• a cooling medium piping arranged such that a cooling medium flows through therein to cool down the fuel cell;
• and
• a depressurization pipe including a first end portion, a second end portion, and a rising portion that is extended vertically upward, the depressurization pipe being configured such that the first end portion is connected with the compressor and that the second end portion is open to the atmosphere, wherein
• the compressor comprises:
• a compression chamber configured to compress air by a rotating body;
• and
• a drive chamber arranged separate from the compression chamber, provided with a driving mechanism that is placed therein to drive the rotating body, configured such that oil flows through therein, and placed to communicate with the first end portion of the depressurization pipe, wherein
• when being viewed in a direction opposed to one side face of the fuel cell, the depressurization pipe and the cooling medium piping are arranged to intersect with each other on the one side face;
• wherein the depressurization pipe and a cooling medium discharge pipe of the cooling medium pipe are placed with a distance of not less than 3 mm and not greater than 3 cm between the depressurization pipe and the cooling medium discharge pipe.