A fuel cell vehicle is provided and includes a system frame on which a fuel cell is mounted and first and second side members extending in a first direction and facing each other in a second direction intersecting the first direction. A first fastening part fastens the system frame to each of the first and second side members. The system frame includes a first aperture formed therein in a horizontal direction. The first fastening part includes a first support bracket, including a second aperture, a first insertion hole, and a first tab portion extending from the first insertion hole in the horizontal direction, and a first bolt, including a first shank portion inserted into the first aperture, the second aperture, and the first insertion hole in the horizontal direction and a first threaded portion engaged with the first tab portion.