A fuel cell unit includes: a fuel cell stack including: a cell stack; a first terminal respectively disposed at a first end of the cell stack in the first direction; and a second terminal disposed at a second end of the cell stack in the first direction, an end plate disposed at a side opposite to the cell stack with respect to the first terminal; a power converter that converts output power of the fuel cell stack; a stack case that houses the fuel cell stack; a power converter case that houses the power converter and is fixed to the stack case; a first bus bar that electrically connects the first terminal and the power converter in the stack case and the power converter case; and a second bus bar that electrically connects the second terminal and the power converter in the stack case and the power converter case.