To prevent a wire from an electric leak detector from interfering with other components by improving the reliability of electric leak checking.

This fuel cell module 20 is so structured that a case 22 for covering a fuel cell stack 24 is formed, and the electric leak detector 40 is installed in the case 22. A wire 42 for a high voltage for connecting the leak detector 40 to the cell stack 24 is prevented from interfering with other components such as a relay. The leak detector 40 is preferably installed on an end plate 30. The wire 42 is preferably fixed to the end plate 30 with a bolt.