A fuse unit includes a fuse element and an insulative resin part. The fuse element includes a power supply connecting part fixed to a battery post of a battery so as to receive power supply and arranged along an upper surface of the battery, a terminal connecting part to which a terminal is connected, and a fusible part provided between the power supply connecting part and the terminal connecting part. The insulative resin part is arranged on outer surface of the fuse element. The fuse element is bent upwards at a position between the power supply connecting part and the terminal connecting part. The terminal connecting part is arranged at a position above the upper surface of the battery and along a side surface direction of the battery.