An object is to widen detection range of current. A current detection circuit includes a first resistor, which is connected to a first connection terminal and a second connection terminal; a second resistor, which is connected to the first resistor; a third resistor, which is connected to the first resistor; a first transistor, a source of which is connected to the second resistor; a second transistor, a source of which is connected to the third resistor, and a drain and a gate of which is connected to a gate of the first transistor; a third transistor, a source of which is connected to the source of the second transistor, and a gate of which is connected to the drain of the first transistor; and a fourth resistor, which is connected to the drain of the third transistor, and to which a voltage is input.