Physical quantity sensor element and physical quantity sensor device

A physical quantity sensor element comprising:

• a beam fixer, a first electrode fixer, and a second electrode fixer, which extend in a direction perpendicular to a support substrate;
• a support beam having one end coupled to the beam fixer and extending in a direction parallel to the support substrate;
• a movable body coupled to another end of the support beam and disposed on both sides with the support beam interposed therebetween in a plan view;
• a first movable comb electrode coupled to the movable body and disposed on one side with the support beam interposed therebetween in plan view;
• a first fixed comb electrode coupled to the first electrode fixer and facing the first movable comb electrode;
• a second movable comb electrode coupled to the movable body and disposed on another side with the support beam interposed therebetween in plan view;
• a second fixed comb electrode coupled to the second electrode fixer and facing the second movable comb electrode;
• and
• self-diagnosis electrodes interposing the first movable comb electrode, the first fixed comb electrode, the second movable comb electrode, and the second fixed comb electrode.