Abstract: The lock-up device includes an input rotary member, an output rotary member, a first torsion spring, a second torsion spring and a third torsion spring. The output rotary member is rotatable relatively to the input rotary member. Torque is transmitted to the first torsion spring from the input rotary member. The second torsion spring is disposed on a further inner peripheral side than the first torsion spring in a radial direction, and is configured to act in series with the first torsion spring. The third torsion spring is disposed on a further outer peripheral side than the second torsion spring in the radial direction, and is configured to act in series with the second torsion spring and transmit the torque to the output rotary member.