To reduce the number of components and assembling man hour by simplifying the constitution, in a sensor device that has, in a case, a mounting substrate mounted with a sensor element and has a vibration isolation structure for preventing external vibration from transferring to the mounting substrate.

An opening in the lower surface of a case body 15 having a connector section 16 is blocked by a cover 12. The mounting substrate 14 on which components such as the sensor element 17 for angular velocity detection and a signal processing circuit 18 are mounted is attached to an attaching section 12b on the upper surface of the cover 12. The mounting substrate 14 and a terminal 16b of the connector section 16 are electrically interconnected through a flexible lead wire 19. The cover 12 is divided into a bonding section 12a of a rectangular frame shape and the attaching section 12b of a rectangular plate shape, and the vibration isolation member 20 is arranged between them.