An offset cancel circuit includes a first amplifying section, a second amplifying section, a third resistor connected between a non-inverting input terminal of the first amplifying section and a non-inverting input terminal of the second amplifying section, and a current source. In the offset cancel circuit, the current source causes a constant current to flow through the third resistor to cancel an offset voltage from output signals of first and second amplifying sections, the constant current corresponding to the offset voltage contained in first and second output signals output from a bridge resistance type sensor.