PROBLEM TO BE SOLVED: To provide an angle sensor device with a novel structure capable of highly accurately detecting angles of a first limb and a second limb by a simple structure.SOLUTION: The angle sensor device includes: a first fitting part 14 to be worn around a first limb 18, where the first fitting part 14 includes a first sensor 24 including a gyro sensor 26 for detecting an angular speed of the first limb 18, and the first fitting part 14 includes measurement means 30 connected to the first sensor 24 and performing the measurement of the angle of the first limb 18 and a second fitting part 16 to be worn around a second limb 20, including a second sensor part 34 that has a bending sensor 36 extending across the first fitting part 14 and the second fitting part 16 for detecting an angle of a joint part 22. The second sensor 34 is connected to the measurement means 30 at a fitting end side fitted to the first fitting part 14, such that the measurement means 30 can measure the angle of the joint part 22 by the second sensor 34.
