To improve responsiveness when operating a lockup device in the lockup device for a fluid type torque transmission device.

This lockup device 5 has a clutch mechanism 6 and a damper mechanism 7. The clutch mechanism 6 has a lockup piston 61, a lockup hydraulic chamber 62, a lockup clutch plate 63, a lockup friction disc 64 and a lockup end plate 65. The lockup piston 61 can energize an inner peripheral part of the lockup clutch plate 63 in the axial direction, and an outer peripheral part of the lockup clutch plate 63 can frictionally engage with the lockup friction disc 64.