An inertial force sensor comprising: a base (202, 402); a first connection electrode (215, 415a) provided on the base; a flexible section (205, 206-209, 251, 409) supported by the base; a driving section (211, 411) that is provided on an upper surface of the flexible section and that causes the flexible section to vibrate; a first detection section (212, 412) that is provided on the upper surface of the flexible section and that detects a displacement of the flexible section; a first interlayer insulating layer (218, 218a) provided on an upper surface of one of the driving section and the first detection section; and a first wiring (216, 217) electrically connecting another of the driving section and the first detection section to the first connection electrode via an upper surface of the first interlayer insulating layer; wherein the inertial force sensor is characterized by further comprising: a second detection section (213, 413) that is provided on the upper surface of the flexible section and that detects the displacement of the flexible section; a second interlayer insulating layer (218b, 218c) provided on an upper surface of the second detection section; a second connection electrode (215, 415b) provided on the base; and a second wiring electrically connecting the one of the first detection section and the driving section to the second connection electrode via the upper surface of the second interlayer insulating layer, wherein the first wiring electrically connects the another of the first detection section and the driving section to the first connection electrode via an upper surface of the second interlayer insulating layer, and wherein at least one of the first connection electrode and the second connection electrode includes: a first piezoelectric layer; a first insulating layer covering a part of the first piezoelectric layer; and a first electrode layer provided on the first insulating layer. a base (202, 402); a first connection electrode (215, 415a) provided on the base; a flexible section (205, 206-209, 251, 409) supported by the base; a driving section (211, 411) that is provided on an upper surface of the flexible section and that causes the flexible section to vibrate; a first detection section (212, 412) that is provided on the upper surface of the flexible section and that detects a displacement of the flexible section; a first interlayer insulating layer (218, 218a) provided on an upper surface of one of the driving section and the first detection section; and a first wiring (216, 217) electrically connecting another of the driving section and the first detection section to the first connection electrode via an upper surface of the first interlayer insulating layer; wherein the inertial force sensor is characterized by further comprising: a second detection section (213, 413) that is provided on the upper surface of the flexible section and that detects the displacement of the flexible section; a second interlayer insulating layer (218b, 218c) provided on an upper surface of the second detection section; a second connection electrode (215, 415b) provided on the base; and a second wiring electrically connecting the one of the first detection section and the driving section to the second connection electrode via the upper surface of the second interlayer insulating layer, wherein the first wiring electrically connects the another of the first detection section and the driving section to the first connection electrode via an upper surface of the second interlayer insulating layer, and wherein at least one of the first connection electrode and the second connection electrode includes: a first piezoelectric layer; a first insulating layer covering a part of the first piezoelectric layer; and a first electrode layer provided on the first insulating layer. a second detection section (213, 413) that is provided on the upper surface of the flexible section and that detects the displacement of the flexible section; a second interlayer insulating layer (218b, 218c) provided on an upper surface of the second detection section; a second connection electrode (215, 415b) provided on the base; and a second wiring electrically connecting the one of the first detection section and the driving section to the second connection electrode via the upper surface of the second interlayer insulating layer, wherein the first wiring electrically connects the another of the first detection section and the driving section to the first connection electrode via an upper surface of the second interlayer insulating layer, and wherein at least one of the first connection electrode and the second connection electrode includes: a first piezoelectric layer; a first insulating layer covering a part of the first piezoelectric layer; and a first electrode layer provided on the first insulating layer. a first piezoelectric layer; a first insulating layer covering a part of the first piezoelectric layer; and a first electrode layer provided on the first insulating layer.