Multi-axis force sensor and acceleration sensor

There is provided a multi-axis force sensor including first and second bridge circuit groups detecting resistances of respective first and second groups of strain resistance elements provided at respective strain producing portions. The strain producing portions are formed on two axes intersecting with respect to each other at a right angle. The first group of strain resistance elements are arranged on one axis across an action portion so as to face with respect to each other, and the second group of strain resistance elements are arranged on another axis across the action portion so as to face with respect to each other. The first bridge circuit groups respectively output a positive voltage when receiving tensile force, and the second bridge circuit groups respectively output a negative voltage when receiving tensile force.