FUEL CELL UNIT

A fuel cell unit (10) includes a fuel cell stack (20) having a coolant channel (23) inside where coolant flows in one direction, and having a first surface (27) parallel to a direction in which the coolant channel extends; a boost converter (40) disposed across a gap from the first surface (27) without being partitioned by a heat shielding member, the boost converter (40) including a current sensor (43) and a capacitor (45) disposed following the first surface; and a case (30) that accommodates the fuel cell stack (20) and the boost converter (40) in a same space, wherein at least one of the current sensor (43) and the capacitor (45) is disposed on an upstream side from a middle of the coolant channel, in the direction in which the coolant channel extends.