To provide a torque fluctuation absorbing device capable of suppressing shift of the center of gravity due to generation of radial force when connecting one spiral spring in series and suppressing rotational vibration.

This torque fluctuation absorbing device is arranged between an output shaft of a driving source and an input shaft of a transmission. It has a plurality of spiral springs composed of an inner end part provided on an inside diameter side, an outer end part provided on an outside diameter side, and an elastic arm connecting the inner end part with the outer end part. The inner end parts and the outer end parts of the plurality of spiral springs are mutually connected to form a connection part. The plurality of spiral springs are arranged in series to form a set of spiral springs. An end part on one side of the set of spiral springs is connected with a first rotary member on an output shaft side of the driving source to form the input part, and the other end part is connected with a second rotary member which is coaxial with the first rotary member on the input shaft side of the transmission to form the output part. This torque fluctuation absorbing device is provided with a centering means for restraining the input part, the output part, and the connection part so that they are on the same axis as the center of rotation of the first and second rotary members.