A sensor device comprising: a bridge circuit having a plurality of impedance elements (Z1, Z2, Z3, Z4), at least some of which have impedance according to a physical quantity of a detection target; and an offset adjustment circuit for adjusting an offset of an output voltage of the bridge circuit, wherein the bridge circuit has two series circuits (11A, 11B), each of which includes two or more of the impedance elements (Z1, Z2, Z3, Z4) connected in series between a node which is connected to a power supply line and a node which is connected to a ground, wherein the offset adjustment circuit has a voltage dividing circuit which is inserted between the impedance elements (Z1, Z2) in an intermediate pathway of a first series circuit of the two series circuits (11A, 11B) and is configured to divide a voltage between nodes (N3, N4) at both ends in the inserted intermediate pathway and output the divided voltage from an output node, characterised in that the offset adjustment circuit further includes a constant voltage circuit which is configured to keep a voltage (Vn) between the nodes (N3, N4) at both ends in the voltage dividing circuit constant, a voltage dividing ratio of the voltage dividing circuit is adjustable, and the offset adjustment circuit is configured to perform adjustment of the offset by adjusting the voltage dividing ratio such that the voltage between the output node of the voltage dividing circuit in the first series circuit on one side and an intermediate node of a second series circuit of the two series circuits (11A, 11B) on the other side, approaches a predetermined value. a bridge circuit having a plurality of impedance elements (Z1, Z2, Z3, Z4), at least some of which have impedance according to a physical quantity of a detection target; and an offset adjustment circuit for adjusting an offset of an output voltage of the bridge circuit, wherein the bridge circuit has two series circuits (11A, 11B), each of which includes two or more of the impedance elements (Z1, Z2, Z3, Z4) connected in series between a node which is connected to a power supply line and a node which is connected to a ground, wherein the offset adjustment circuit has a voltage dividing circuit which is inserted between the impedance elements (Z1, Z2) in an intermediate pathway of a first series circuit of the two series circuits (11A, 11B) and is configured to divide a voltage between nodes (N3, N4) at both ends in the inserted intermediate pathway and output the divided voltage from an output node, characterised in that the offset adjustment circuit further includes a constant voltage circuit which is configured to keep a voltage (Vn) between the nodes (N3, N4) at both ends in the voltage dividing circuit constant, a voltage dividing ratio of the voltage dividing circuit is adjustable, and the offset adjustment circuit is configured to perform adjustment of the offset by adjusting the voltage dividing ratio such that the voltage between the output node of the voltage dividing circuit in the first series circuit on one side and an intermediate node of a second series circuit of the two series circuits (11A, 11B) on the other side, approaches a predetermined value.