A fitting type damper capable of significantly increasing a slipping torque, and a production method therefor, the damper being capable of increasing greatly a slipping torque not only while it is still new but after subjected to an aging test or endurance test, wherein organosilane which is gamma -mercaptopropyltrimethoxysilane (4) is fixed and deposited as an anti-slipping agent between a hub (1) consisting of metallic parts and a rubber-like elastic body (3) and between a mass body (2)consisting of metallic parts and the rubber-like elastic body (3).