Vibration damping device

A vibration damping device, comprising:

• a pendulum mass that is held in a rotary member while being allowed to be oscillated by torque pulses applied to the rotary member,
• a casing including a first casing member and a second casing member individually fixed to each surface of the rotary member by a rivet to cover the pendulum mass liquid-tightly;
• and
• a predetermined member that is also fixed to the rotary member by the rivet in a manner to transmit torque therebetween;
• wherein the rivet comprises a head, a first shaft axially protruding from one side of the head, and a second shaft axially protruding from the other side of the head in an opposite direction;
• wherein the first shaft penetrates through the first casing member, the rotary member and the second casing member overlapping one another, and a tail of the first shaft is expanded to fasten the first and second casing members and the rotary member together;
• and
• wherein the second shaft penetrates through the predetermined member, and a tail of the second shaft is expanded to fasten the predetermined member to said another side of the head of the rivet.